The mobile previewer does not function on my ATI 5770 HD with the releases stated in the title. It does on versions prior to those. Is this a UDK problem or an ATI driver problem?

I tried to preview the Jazz tutorial it it chucks out the following ...

Code:
Rendering thread exception:
Failed to compile shader code (see log for details.)

Address = 0x7486b9bc (filename not found) [in C:\Windows\syswow64\KERNELBASE.dll]
Address = 0x5a49f1   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x6d006f   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x690070   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x65006c   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x770020   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x740069   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x200068   (filename not found) 
Address = 0x680074   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x200065   (filename not found) 
Address = 0x6d006f   (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x16bdf61  (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x165296a  (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x690bf0e6 (filename not found) [in C:\Windows\system32\atioglxx.dll]
Address = 0x6941a2d6 (filename not found) [in C:\Windows\system32\atioglxx.dll]
Address = 0x1641d18  (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]
Address = 0x165c856  (filename not found) [in f:\udk\udk-2011-08\binaries\win32\udk.exe]