Version Mismatch when playing online
I cannot play online I get some kind of version Mismatch.
I also get some bogus 100 error popup when starting the game
I am assuming this is for online play on other servers that might have modified certain files for playing on that server. This happens in UT99 all the time.
I am not sure if it works the same but when the mismatch occurs it should tell you the file name. Exit the game, go and find the file and copy it and rename the copy so you can find it later if you need to use the original again. Delete the file (but you still have a back-up copy).
Then go and play on that server again. The file you need should download to your pc for use. If it does not work, go back and get the back-up copy of the file, rename it to the right name and use it again.
Hope this helps.