.85 is definitely better than previous versions, but still needs work.
I installed .85 after a full wipe with Crackmem. My biggest issue is that the phone steadily loses memory over a day or two until it becomes very flaky and i do a battery pull. After a battery pull I'm at about 49MB. When it gets below 25MB i pull the battery and reset.
I am VERY anal about closing any program I use. I use the phone app mostly, with a little browsing, a bit of SMS texting & email (and a bit of Brick Breaker).
The only 3rd party app I have on my BB is Google maps 2.3.2 (which I use very little).
My 2 cents.