Hello,
some months passed since I last played with UT3, but everything worked fine on my PC (apart from the OpenAL bug as I have an X-FI with X-RAM).

Anyway, I just upgraded to version 2.0 and I found that now the game crashes each time I click on the multiplayer item in the menu.
The hardware is the same, and I didn't reinstalled windows in the meantime.

I upgraded my video card and audio card drivers to the last version, but nothing was resolved. Currently I have disabled X-RAM with the registry key, but I don't think this issue is related to the sound card.

On the log, I see the following lines:
Code:
Log: FSTUNClient starting test 2...
Log: FSTUNClient test timeout, NAT is strict.
Critical: appError called:
Critical: SECURE CRT: Invalid parameter detected.
Critical: Windows GetLastError: Operazione completata. (0)
Log: === Critical error: ===
SECURE CRT: Invalid parameter detected.

RaiseException() Address = 0x7c812aeb (filename not found) 
CxxThrowException() Address = 0x78158e89 (filename not found) 
Address = 0xbb4c52   (filename not found) 
Address = 0xe8781b4c (filename not found)
Googling around I find a similar error associated to https connections, but nothing related to Unreal Tournament 3.

Has anybody som ideas on what causes the crash?

The complete log follows:
Code:
Log: Log file open, 04/12/09 23:45:05
Init: Version: 3797
Init: Epic Internal: 0
Init: Compiled: Mar  3 2009 09:00:27
Init: Command line: 
Init: Base directory: D:\Unreal Tournament 3\Binaries\
Init: Character set: Unicode
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTEditor.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTEditorUserSettings.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTCompat.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTEngine.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTGame.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTInput.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTUI.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTMapLists.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTVote.ini
Log: Deleting old log file Launch-backup-2009.04.12-23.45.05.log
Init: Computer: CORE2DUOMARCO
Init: User: Marco
Init: CPU Page size=4096, Processors=2
Init: High frequency timer resolution =2337.670000 MHz
Init: Memory total: Phys=3406856K Pagef=4194303K Virt=2097024K
Init: WinSock: version 1.1 (2.2), MaxSocks=32767, MaxUdp=65467
Init: WinSock: I am core2duomarco (192.168.1.1:0)
Init: Presizing for 83221 objects not considered by GC, pre-allocating 0 bytes.
Init: Object subsystem initialized
Init: Startup System Settings:
Init: System Settings:
Init: 	StaticDecals=true
Init: 	DynamicDecals=true
Init: 	DynamicLights=true
Init: 	DynamicShadows=true
Init: 	LightEnvironmentShadows=true
Init: 	CompositeDynamicLights=false
Init: 	DirectionalLightmaps=true
Init: 	MotionBlur=false
Init: 	DepthOfField=true
Init: 	Bloom=true
Init: 	QualityBloom=true
Init: 	Distortion=true
Init: 	DropParticleDistortion=false
Init: 	SpeedTreeLeaves=true
Init: 	SpeedTreeFronds=true
Init: 	OnlyStreamInTextures=true
Init: 	LensFlares=true
Init: 	FogVolumes=true
Init: 	FloatingPointRenderTargets=true
Init: 	Trilinear=true
Init: 	OneFrameThreadLag=false
Init: 	UseVsync=true
Init: 	UpscaleScreenPercentage=true
Init: 	Fullscreen=true
Init: 	AllowD3D10=true
Init: 	EnableHighPolyChars=true
Init: 	SkeletalMeshLODBias=0
Init: 	ParticleLODBias=0
Init: 	DetailMode=2
Init: 	ShadowFilterQualityBias=1
Init: 	MaxAnisotropy=16
Init: 	MaxMultisamples=1
Init: 	MinShadowResolution=32
Init: 	MaxShadowResolution=512
Init: 	ResX=1280
Init: 	ResY=1024
Init: 	ScreenPercentage=100.000
Init: 	SceneCaptureStreamingMultiplier=1.000
Init: 	FoliageDrawRadiusMultiplier=1.000
Init: 	ShadowTexelsPerPixel=2.000
Log: 	TEXTUREGROUP_World: (MinLODSize= 256,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_WorldNormalMap: (MinLODSize= 512,MaxLODSize=1024,LODBias=1)
Log: 	TEXTUREGROUP_WorldSpecular: (MinLODSize= 256,MaxLODSize=1024,LODBias=1)
Log: 	TEXTUREGROUP_Character: (MinLODSize= 512,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_CharacterNormalMap: (MinLODSize= 512,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_CharacterSpecular: (MinLODSize= 512,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_Weapon: (MinLODSize= 512,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_WeaponNormalMap: (MinLODSize=1024,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_WeaponSpecular: (MinLODSize= 512,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_Vehicle: (MinLODSize=1024,MaxLODSize=2048,LODBias=0)
Log: 	TEXTUREGROUP_VehicleNormalMap: (MinLODSize=1024,MaxLODSize=2048,LODBias=1)
Log: 	TEXTUREGROUP_VehicleSpecular: (MinLODSize=1024,MaxLODSize=2048,LODBias=1)
Log: 	TEXTUREGROUP_Effects: (MinLODSize= 256,MaxLODSize=1024,LODBias=0)
Log: 	TEXTUREGROUP_Skybox: (MinLODSize= 512,MaxLODSize=2048,LODBias=0)
Log: 	TEXTUREGROUP_UI: (MinLODSize=1024,MaxLODSize=4096,LODBias=0)
Log: 	TEXTUREGROUP_LightAndShadowMap: (MinLODSize= 512,MaxLODSize=4096,LODBias=0)
Log: 	TEXTUREGROUP_RenderTarget: (MinLODSize=   1,MaxLODSize=4096,LODBias=0)
Init: Friendly System Settings:
Init: 	TextureDetail=Level5
Init: 	WorldDetail=Level5
Init: 	bUseVSync=1
Init: 	bUseMSAA=0
Init: 	ScreenPercentage=100
Init: 	UpscaleScreenPercentage=1
Init: 	ResX=1280
Init: 	ResY=1024
Init: 	Fullscreen=1
Init: 	AllowMotionBlur=0
Init: OS stats:
Init: 	Windows XP Service Pack 3
Init: 	RemoteDesktop=0
Init: Memory stats:
Init: 	Physical: 3327MB
Init: 	Virtual: 2047MB
Init: 	PageFile: 4095MB
Init: CPU stats:
Init: 	MeasuredPerformanceTime: 394.400 (stored result)
Init: 	Hyperthreaded: 1
Init: 	NumProcessorsPerCPU: 1
Init: 	NumLogicalProcessors: 2
Init: 	NumPhysicalProcessors: 2
Init: 	MaxSpeed: 2337
Init: 	CurrentSpeed: 2337
Init: 	CoresPerProcessor: 2
Init: 	IsOnBattery: 0
Init: 	BatteryLevel: -1
Init: 	Manufacturer: Intel
Init: 	CPUName: Unknown INTEL CPU
Init: 	L1CacheSize: 32
Init: 	L2CacheSize: -1
Init: 	Architecture: x86
Init: GPU stats:
Init: 	VendorID: 000010DE
Init: 	DeviceID: 00000611
Init: 	DriverVersion: 6.14.11.8250
Init: 	DeviceName: NVIDIA GeForce 8800 GT 
Init: 	DriverName: nv4_disp.dll
Init: 	PixelShaderVersion: 3
Init: 	VertexShaderVersion: 3
Init: 	VRAMQuantity: 512
Init: 	DedicatedVRAM: 500
Init: 	AdapterCount: 1
Init: 	SupportsHardwareTnL: 1
Init: 	GPU DeviceID not found in ini.
Init: Machine  detected compatibility level: Composite: 3. CPU: 5. GPU: 3.
Init: Previous detected compatibility level: Composite: 3. CPU: 5. GPU: 3.
Log: Initializing FaceFX...
Log: FaceFX initialized:
Log:     version  1.710000
Log:     licensee Unreal Engine 3 Licensee
Log:     project  Unreal Engine 3 Project
Log: Preloading (default) startup map UTFrontEnd
Log: GConfig::Find has loaded file:  ..\Engine\Localization\ITA\Engine.ITA
Log: GConfig::Find has loaded file:  ..\Engine\Localization\INT\Engine.INT
Log: A mod has been loaded via file 'LocalShaderCache-PC-D3D-SM3', award progress has been disabled...
Log: Loaded shader cache LocalShaderCache-PC-D3D-SM3.CacheObject: 264 shaders(0 legacy, 0 redundant), 11 materials
Log: Loaded shader cache RefShaderCache-PC-D3D-SM3.CacheObject: 24748 shaders(0 legacy, 203 redundant), 2548 materials
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\ITA\UTGame.ITA
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\INT\UTGame.INT
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTWeapon.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTCustomChar.ini
Log: GConfig::LoadFile associated file:  ..\UTGame\Config\UTMap.ini
Log: GConfig::LoadFile has loaded file:  ..\UTGame\Config\UTWeb.ini
Log: GConfig::Find has loaded file:  ..\Engine\Localization\ITA\OnlineSubsystemGameSpy.ITA
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\ITA\UTGameContent.ITA
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\INT\UTGameContent.INT
Log: 99893 objects as part of root set at end of initial load.
Log: 0 out of 0 bytes used by permanent object pool.
Log: Initializing Engine...
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\INT\UTEditor.INT
Init: UEngine initialized
Log: Looking for DLC...
Log: Object size..............: 60
Log: Actor size...............: 436
Log: ActorComponent size......: 88
Log: PrimitiveComponent size..: 448
Init: ALAudio device requested : 
Init: ALAudio device opened    : SB X-Fi Audio [EC00]
Init: AL_VENDOR      : Creative Labs Inc.
Init: AL_RENDERER    : SB X-Fi Audio [EC00]
Init: AL_VERSION     : OpenAL version 1.1
Init: AL_EXTENSIONS  : EAX
EAX1.0
EAX2.0
EAX3.0

Init: Device supports: ALC_EXT_EFX
Init: Found EFX extension with 0 effect slots and 1 potential sends
Init: ...'reverb' supported
Init: ...'low pass filter' supported
Init: ...failed to initialise EFX (reverb and low pass filter)
Init: XRAM           : NO
Init: ALAudioDevice initialized.
Init: Client initialized
Log: Performing DNS lookup for stunserver.org
Log: GConfig::Find has loaded file:  ..\UTGame\Config\UTUT3Fixer.ini
Log: GConfig::Find has loaded file:  ..\UTGame\Config\DLC_MapInfo.ini
Log: GConfig::Find has loaded file:  ..\UTGame\Config\TitanPack.ini
PlayerManagement: Creating new player with ControllerId 0
PlayerManagement: Successfully created new player with ControllerId 0: LocalPlayer_0
Log: Browse: UTFrontEnd?Name=gourry1981?team=255?Class=
Log: Award progress has now been fully reenabled!
Log: LoadMap: UTFrontEnd?Name=gourry1981?team=255?Class=
Log: Virtual  memory allocation size: 217.52 MByte (228081664 Bytes)
Log: Physical memory allocation size:   0.00 MByte (0 Bytes)
Log: Game class is 'UTEntryGame'
Log: Primary PhysX scene will be in software.
Log: Creating Primary PhysX Scene.
Log: Novodex Terrain Creation (Terrain_1): 0.242155 ms
Log: Novodex Terrain Creation (Terrain_0): 0.240840 ms
Warning: USkeletalMeshComponent::InitArticulated : No PhysicsAsset defined for UTFrontEnd.TheWorld:PersistentLevel.UTCustomChar_Preview_0.SkeletalMeshComponent_0 with skeletalmesh CH_TwinSouls_Cine.Mesh.SK_CH_TwinSouls_Cine_FemaleA
Warning: USkeletalMeshComponent::InitArticulated : No PhysicsAsset defined for UTFrontEnd.TheWorld:PersistentLevel.UTCustomChar_Preview_1.SkeletalMeshComponent_11 with skeletalmesh CH_IronGuard_Male.Mesh.SK_CH_IronGuard_MaleA
Warning: USkeletalMeshComponent::InitArticulated : No PhysicsAsset defined for UTFrontEnd.TheWorld:PersistentLevel.UTCustomChar_Preview_2.SkeletalMeshComponent_22 with skeletalmesh CH_IronGuard_Male.Mesh.SK_CH_IronGuard_MaleA
Warning: USkeletalMeshComponent::InitArticulated : No PhysicsAsset defined for UTFrontEnd.TheWorld:PersistentLevel.UTCustomChar_Preview_3.SkeletalMeshComponent_33 with skeletalmesh CH_IronGuard_Male.Mesh.SK_CH_IronGuard_MaleA
Warning: USkeletalMeshComponent::InitArticulated : No PhysicsAsset defined for UTFrontEnd.TheWorld:PersistentLevel.UTCustomChar_Preview_4.SkeletalMeshComponent_44 with skeletalmesh CH_IronGuard_Male.Mesh.SK_CH_IronGuard_MaleA
PerfWarning: InstanceGeom: 3.024079 ms - 427 Convex, Terrain 0.477910 ms, PerTriSM 0.000000 ms, InitArticulated 0.048332 ms, BodyInst Alloc 4.038550 ms, InitBody 27.461596 ms
PerfWarning: NxActor Creation: 15.143637 ms
Log: Bringing World UTFrontEnd.TheWorld up for play (0) at 2009.04.12-23.45.17
Log: Bringing up level for play took: 0.246687
ScriptLog: UTPlayerController::OnReadProfileSettingsComplete() - bWasSuccessful: , ControllerId: 0
Log: UTEntryPlayerController_0 got player LocalPlayer_0
ScriptLog: UTPlayerController::ClientSetOnlineStatus() - Setting online status for ControllerId: 0
Error: StopLocalVoiceProcessing: Ignoring stop request for non-owning user
Log: ########### Finished loading level: 3.392030 seconds
Init: Game engine initialized
Log: Initializing Engine Completed
Log: Starting memory preloaded movie...Copyright_PC ()
Log: Waiting for memory preloaded movie to finish loading ...
Log: Playing movie [Copyright_PC]
Log: Got memory preloaded movie event!!!
Log: Unmute bink movie
Log: Next movie? 1 / 7
Log: Playing movie [EpicLogo]
Log: Next movie? 2 / 7
Log: Playing movie [MidwayLogo]
Log: Next movie? 3 / 7
Log: Playing movie [UE3_logo]
Log: Next movie? 4 / 7
Log: Playing movie [Nvidia_PC]
Log: Next movie? 5 / 7
Log: Playing movie [Intel_Duo_Logo]
Log: Next movie? 6 / 7
Log: >>>>>>>>>>>>>> Initial startup: 20.31s <<<<<<<<<<<<<<<
Log: GConfig::Find has loaded file:  ..\UTGame\Localization\ITA\UTGameUI.ITA
ScriptLog: Setting image img_Krall01 to visible
ScriptLog: UTUIFrontEnd_LoginScreen::OnLogin() - Attempting to login with name 'gourry1981' bLocalOnly: 
Log: Ambient1 | Ambient1
ScriptLog: Retrieving Profile Settings for UI PlayerIndex 0
Log: Changing subtitle setting, new value: 1
ScriptLog: UTPlayerController - Setting netspeed to 10000
Log: FSTUNClient resolved stunserver.org (208.86.225.201)
Log: FSTUNClient starting test 1...
ScriptLog: Login change...requerying profile data
ScriptLog: Setting image img_Krall01 to visible
Log: Performing DNS lookup for stun.xten.com
Log: FSTUNClient resolved stun.xten.com (75.101.138.128)
Log: FSTUNClient starting test 1...
ScriptLog: UTPlayerController::OnReadProfileSettingsComplete() - bWasSuccessful: , ControllerId: 0
ScriptLog: Retrieving Profile Settings for UI PlayerIndex 0
Log: Changing subtitle setting, new value: 1
ScriptLog: UTPlayerController - Setting netspeed to 15000
Log: FSTUNClient starting test 2...
Log: FSTUNClient test timeout, NAT is strict.
Critical: appError called:
Critical: SECURE CRT: Invalid parameter detected.
Critical: Windows GetLastError: Operazione completata. (0)
Log: === Critical error: ===
SECURE CRT: Invalid parameter detected.

RaiseException() Address = 0x7c812aeb (filename not found) 
CxxThrowException() Address = 0x78158e89 (filename not found) 
Address = 0xbb4c52   (filename not found) 
Address = 0xe8781b4c (filename not found)
Thanks to everybody!