I have also had similar crashing issues recently (on stock JVQ with KC1/KG3 modem, rooted)
I had thought it may have been a launcher issue, but no, I have had the issue occur with different launchers. Also, lately I have had dropped calls....regardless of signal strength or whether I dial out or pick up a call. Both are getting to be annoying.
edit: also forgot to add that I have crashed to home screen after entering the dialer and pressing a few numbers (not actually completing the entire phone number; around 4 digits usually).
If you've found my post helpful, you can thank me by clicking the 'Thanks' button.
Mitsubishi G75 - Sony Ericsson T200 - Sony Ericsson T226 - Motorola SLVR L7 - Nokia N95 8GB - Sony Ericsson Xperia X10 - Samsung I9000 Galaxy S - Apple iPhone 4 16GB -Sony Ericsson Xperia Arc/X12 - Galaxy Nexus I9250 - Galaxy SIII I747 32GB