This is not scientific by any means but I got really tired of getting random screen freezes while browsing. They would last about 3-4 seconds and must have happened about 20 times a day. So I decided to just visit the webOS doc and do a complete reinstall. This time I installed the same preware patches. What I decided not to do this time was overclock and leave the kernel alone. I also decided not to install the glass theme. I've had it like this for 2 days now and not one lockup or freeze.