I\'m using Versions for SVN.
I attempt to commit and get this message:
Commit failed (details follow): \'/Users/mike/Sites/mysite.com/astss-
I had the same problem with Versions displaying the same message. I simply right clicked the offending files and selected 'Revert...' from the right-click menu and all was good.
Basically Versions (actually Subversion) thinks you still want to add the file, but it cannot find it because you deleted it in the file system. The Revert option tells Subversion to forget about adding it.