The issue starts with inactive profiles (those that had been imported,
but since have been inactive in AD) are still showing up on people
search results and their public mysites are still accessible. According
to the SP1 KB, as short as it was on this subject, it said it had fixed
it. I have implemented SP1 on a dev environment and the same scenario
exists, disabled/deleted accounts in AD which are dumped to the inactive
profile bucket after x number of full imports, are still showing up on
searches and public view of Mysites are still accessible. It doesn't
seem to have deleted them.