The discard changes option appears to be broken for certain working copy changes. I have used the reset all option under Discard to abandon all local changes but nothing happens whatsoever, the files are still there under working copy changes list even though they were never touched. The project I am working on is cross platform with Linux which has components that require these files to be left in their current case. I'm fairly sure this is due to SourceTree not handling case sensitive file-names at all.