Suspect WiFi issue
My phone: LG Shine; rooted. My provider is Telus in Edmonton.
Android v2.3.2 very stable with almost zero problems. Upgraded to v2.3.3 via LG Mobile Support Tool and almost immediately I start to experience the freezing problems described in this thread.
After a bit of messing around I disable Juice Defender and the freeze problem almost, but not quite, disappears.
I am using the paid version of Juice Defender and it was working well with the 2.3.2 ROM.
On another board I discovered that dialing *#*#4636#*#* on the phone keypad brings up a test menu. (4636 = INFO). Some neat stuff in here. I didn't mess with any settings but noticed that the WiFi related items cause the phone to freeze. Eventually I get a screen asking if I want to force quit the application.
Bottom line is I fully suspect the problem is related to WiFi.
I will see if I can go 24 hours with no freezing. If not, I will disable WiFi completely and see what happens.