I have been having similar problems since the GB update. I haven't had any problems with Sense widgets...I don't use FriendStream, but the bookmarks widget has worked fine for me. My problems are with the skins, scenes, and wallpaper apps. When I try to change the wallpaper, I get an error message of "Phone Storage Full". When I try to change the skin, Sense forcecloses...same result if I change the scene. I've tried to do a factory reset, but the phone freezes in the middle of the wipe and I have to pull the battery. Finally went to Verizon today and they are sending me a new phone. I guess we'll see how that goes. The phone I have was an insurance replacement, so maybe a brand new phone will function better. I know that none of this is really helpful, but I thought I'd share my experience.