I get this error when I do an svn update:
Working copy XXXXXXXX locked Please execute \"Cleanup\" command
When I
Are you using TortoiseSVN and just upgraded? I've had that problem before when moving from 1.4 to 1.5 and not rebooting. (Try a reboot).
The reason you need to reboot is because the cache file gets all funky.
Otherwise, to just move on, export that working copy into a new folder (don't copy the .svn hidden folders), re-checkout the project, and move all your code back, then proceed with your commit.