I used to suffer from BugSplats when using SU5 on a pc years ago. Switched to Mac in 2008 and never had a problem since until this week whilst using 2013 Pro when it has crashed twice whilst doing simple floor plans. The only plugin I've loaded so far is SU Podium which I used to use on previous versions but used my licence key to download the latest version. teething problems with SU2013 Pro maybe?