Win2k, build 511, jdk1.3.1, cvs 1.11 using pserver (server is running on Mandrake 8.1).
My project is about 1700 source files, and about 6000 total files. I had no problem with cvs integration with build 505, or 2.0.3. In fact, when I first installed 511, it seemed to work fine. But after about a full day of use, the IDE now pauses after virtually every keystroke for ~1-3 seconds. This pause goes away when CVS integration is turned off. I also noticed that with each pause, the IDE's memory usage goes up 2-3 meg.
