After all the posts I have read today(Including yours), I'm somewhere between sending my tab in to acer (It's still under warranty) and attempting to go back to HC (have not rooted a device before, but tech savey). I really like ICS, and unlike some others, everything seems to work but the rotation. But man that's just about a deal breaker as i have a lot of tech manuals on my pad and would rather view them in portrait mode.OK.... I bit the bullit and did a go back to HC. I bricked it at first but with help from others, including Mrhelper, I have a tablet that is working the way it was intended. I'm back to 3.2.1. It's not easy but well worth the trouble. There were lots of nice features on ICS I will miss but untill they fix the bugs I'll stick with 3.2.1.
Whatever i decide to do I really don't want to lose my browser bookmarks. Trying to find them in dual file manager. Have not succeeded yet. Do they get backed up like mail and contacts to google.