I have NT 16G with CM7. After waking device from sleep, I was unable to toggle wi-fi state, it stuck on "Turning off.." message. When I tried to restart tablet, it shutdown but not boot up. Just stuck with blank screen and backlight on. So I held power button to shut it off. Then turn it on again.
After that, I can't change anything in internal memory. Device turns on and works for some time, but then restarts on it's own and go back to state before wi-fi problem. Any changes, as new/removed files, applications etc, revert back. Even full wipe via Ubuntu didn't work: after reboot everything back to previous state.
In dmesg I have message
mmcblk0: retrying using single block read