Noticed this today by accident. Working on build 2181 with a project on a mounted Samba share.
1. From the top menu, select Project > Add Folder to Project .
2. Ignore the modal-window that opens, return focus to the main Sublime Text 2 window.
3. Open a file from the sidebar. Response time and window GUI repainting is sluggish.
4. Close the modal-window. Expected performance is restored.
Not a huge deal as it's not the usual use-case, but thought I'd mention it.