IDEA can not handle large Java files (3-5 megabytes). Here is how to reproduce this issue: 1. Install a fresh instance of IDEA build# 7020 and start IDEA from the command line to see the output 2. Open the project "test_project/tsxt_project.ipr" - see text_project.tar.gz 3. See the exception like "test_project/exception.txt" in the IDEA command line. IDEA 6.x did not have this exception; IDEA builds 68xx had this exception but were not broken otherwise, build 7020 appears to be frozen after opening a real project that has a large file and uses Perforce integration. For build 7020 local history does not seem to work for large files: If you edit large file and then try to see the changes using local history the following error is displayed: "The difference can not be shown because one of the selected revisions has very large content". If I try to revert to a previous version using local history I get the following error: "Can not revert because some of the files have big content". Also if I try to replace all "3 megabytes" to "5 megabytes" IDEA gets frozen for long time (several minutes) so I have to kill it. Please let me know if you need more information. Thank you, Maxim.