I'm still undecided about this new firmware. It has some really nice features, but they traded form for function on the home screen, and that kinda bugs me.
However, after more than week of steady use I can happily report that the new firmware is quite stable. The phone has performed flawlessly. No freezes, spontaneous reboots or dropped calls. I have had the occasional browser crash, but they have been fewer and farther between than on v31.
No software issues either. All the apps I have tried have performed as expected.
Overall I'd rate stability of v41.2.005 as better than v31.2.101.
If you are having trouble I'd suggest trying a a re-flash, and if that doesn't help, then hard reset, re-flash and manual reload. Never hurts to "clean house" once in a while.