Connection
* Being disconnected periodically with a PunkBuster error after Project Reality installation:
After installing a new version of Project Reality you may be periodically disconnected from servers with PunkBuster errors (including but not limited to):
"You have been kicked via PunkBuster (for n minutes)... MD5Tool Mismatch: [filename]" - this occurs if the MD5 Checksum of a PR file (or any other BF2 core file) differs from the one on the server. Most likely your file has been changed (this might occur if you modified a file with an object/map editor).
Usually this problem is almost always corrected by uninstalling and reinstalling Project Reality, then reapply the latest BF2 patch (v1.41). If this doesn't work, try again but also uninstall and reinstall Battlefield 2.
You should also try updating punkbuster via pbsetup, for more information go to the Evenbalance Support Page.