Context: I am using SourceTree to browse a git-annex repository. A checked-in file is a symlink which points to the real content somewhere else. The "git annex unlock" operation replaces the symlink with the real file for editing. Then the working copy is dirty, but SourceTree shows no changes. "git status" in the commandline correctly shows unstaged "typechange: ..." changes.

Summary: SourceTree should display a file as changed even if it is only a "typechange".

I don't have verified but I suspect this behaviour is also present in the windows version.