You are being vague. Exact changelist please!
Removed some memory leaks
Fixed crashes when the game attempted to render lots of content (high detail, high FOV or multiple-monitor modes)
Chat window no longer causes lag spikes
Chat window reworked opacity & visibility-time is controllable through settings in settings.ini
Clantag is remembered when using auto-login
Banner URLs can be up to 252 characters in length
SecuROM wrapper removed from non-Steam version
Minor performance improvements
Reduced rubberbanding on >24player servers

How large is the patch?
It is approximately 2.6GB.

J'ai hâte de tester ça