There have been about three other threads on this topic. The takeaway seems to be that while some folks have found temporary (or even permanent) relief with some solutions, there are some of us for whom no solution works.
The OTHER takeaway seems to be that Verizon is denying the existence of a problem. The tech I spoke with said he hadn't heard of this problem with Bionics, and I've seen posts in other threads along the same lines.
(As my tech denied any problem at his end, he said the solution was to send me a replacement bionic -- apparently, the first thing they do is replace the phone; the SECOND thing they do is consider if it's a network problem. I've had the replacement Bionic for all of a day, and it's had one data drop. No, no, cancel that -- I just took a look at it and it dropped right now. Looks like I'm going to be on the phone with Verizon again.)
In any event, my advice is to call Verizon. I can't promise they'll give you a workable solution, but I think we'll be better off if they get enough calls that they'll have to acknowledge something went wrong over the last couple of weeks.
INTERESTING ADDITION: I'd never really been certain if the data drops were caused by .905 -- they seemed to begin around the .905 upgrade, but not precisely then. I just checked the replacement Verizon sent me, and it's still on .902 (and still having data drops).