When I try to update some files from Subversion, I get the error:
org.tigris.subversion.javahl.ClientException:
Checksum mismatch while updating \'D:\\WWW\\
I had a the same error but for one file. In IntelliJ IDEA I was able to make a copy of the file, then go into the project and delete the file in question, then commit successfully. Then, I made a new file with the same name and copy the contents back into it. I guess you would lose the revision history but it does work.