While I did have a few issues with programs that refused to quit, it never froze through high humidity, intense heat or anything else. Didn't have it long, but no issues thus far.

Maybe you had a moody device? Or maybe I didn't hit them yet :P Seems stable, though.

ETA:

Update: Here' a few screenshots (figured out how to SS the device)

* The task manager. As you can see, several apps are running, including mail (running), Chat(running) and a screensnap app (works async).

* Two screens of Nokia's Battery Monitor. Sorry about the trimmed screens, apparently the screen shot app goes a bit awry when apps work in force-portrait mode.

As you can see, I have 93% left, which is over 3 days background use (with 3G, wifi, BT, screen to full and no power saving - it jumps to 9+ days if I cut back, some 5 online and kicking), 2.2 days average use (I pop it on, check mail, browse a little, send a few messages, talk and then lock again). It also shows an estimate of 5 hrs or talk time on 3G (9 or so on 2G), 4H 40 mins online, 35 hours music (headphones) and, cut from picture, also indicates 6:20 "maps" use (GPS, light, etc), and 3-4 hours "camera" - by which it means filming. yesterday I decided to have at it and filmed 4 hours. I was left with 37%. Screen also shows last charge.

The second shot shows averages, but I reset it recently. As you can see, it reports per-app use in "today" "last week" and "all time" categories. The app also sports an automatic power saving mode threshold, extending the 20% "12 hours use" to "2 days +". A lifesaver last night when I forgot my charger at home.

So, extending on my battery review, a few figures straight from Nokia's mouth.