We've recently imaged 5 identical OSX Yasomite macbooks with sourcetree on them.

They're all showing identical symptoms that it seems randomly after a period of time or restarting, the bookmark manager displays every repo as missing and you need to relink it.

The folders are not moving and nothings changing, and once you relink it, it works again for a period of time.

Might be worth noting that the users are not admins or in the sudoers file.