Yup. Got a Motorola Droid bionic and I have been having problems with it over the last few days not connecting to 4G at all and dropping 3G intermittently. Checked the forums yesterday and say there was a leaked version posted up about a week ago! Working better than ever now!
This is a pretty good phone site for upgrades... Lots of nerds over there to do the hard stuff.
http://forum.xda-developers.com/index.php