The all in one patch has been updated again with a minor update. Here’s what was posted on the forums which details the changes:-
I’ve re-uploaded the patch today because there was an overlooked issue with multiplayer since the previous update on level transition if the game was in fullscreen mode and minimized. The whole point of the new patch was basically the fact that with the first one, needless calls were made to the rendering APIs when they shouldn’t be. All this messing around because for some reason the game is coded in the way that it drops network activity if the primary DirectDraw surface is lost.
The update can be downloaded on the downloads page.