Greetings, all,
I can report that, as of the beta version of SP1, the "UI opening after a scheduled scan" issue had NOT been corrected. In my case with the beta, it happened with every scheduled scan except one (and, coincidentally or otherwise, the one time that the UI did not open was a full scan; all others were quick scans).
Just downloaded and installed the final version of SP1, but since it has the same version number ending in .2208 as the beta, I don't expect any change. Will know for sure later this evening...
Regards,
Crashman