If you’re using Subversion at some point you will get the infamous “SVN Working Copy xxx locked and cleanup failed” error. Why you get this error is not exactly known by me, but I believe it to be partly because of subversion’s case sensitivity and Window’s case ignoring.
The simplest solution is to search for lock files which are 0 bytes long and delete these files. Try to commit again and you should have success.
There’s probably dozens of other ways to correct the error and I’m sure my solution won’t always work. How would you fix this problem?