Still using 0.5.0 here (could not be bothered to fix the helper script), and while playing with the blanking_pause thing i found that a long press on lock&blank seems to disable future long presses, or even the ability to bring up ASUI via the power button. Only fix so far is a device reboot as simply restarting ASUI did not help.

edit: ugh, no sooner had i written that then i found out that letting the device dim the screen via the idle timer fixes it. The odd thing is that when that happens the screen acts as if it had been locked the whole time, so i had to unlock it via the power button. Once that was done i could long press again.

edit2: the lock bit above may have come from me accidentally turning on the autolock, oops.