I activated the stock slot, did a Factory Reset, installed cm and gapps. It boots, shows the safestrap splash screen, then goes to a black screen with the backlight on. Nothing after that.
I can connect with adb and see the logs, there are repeated heap dumps from something crashing, but I don't see a line saying what. It appears to be trying to start AndroidRuntime and dalvik (same thing?) over and over. Does this give anyone a clue?
I also tried wiping /system after a factory reset, but it just hangs on the black screen, no change.
Before this, I had the latest OTA in the stock slot, and I was running eclipse rom 1.0.8 (or something) in slot 1. I am able to restore my safestrap backup of the stock slot and the stock rom still works.