Trying to Edit a Text Frame causes UI lockup
Open an operable MS3 file with MS4 release version. Agree to MS4 update. Apply old MS3 Style. Agree to Style update and save it. Play with the score - it will work. Double Click on Text frame or Text inside the text frame of the score title block. UI goes into a trance and stays there. Restarting recovers the file but the problem persists.
Note sure if the Style sheets has anything to do with the problem; it may not. //Don