I still haven't tested the new libalarm, but will install it in one of the dev N900s. As a bug report, this is as bad as it gets, but it's only happened once (I'm talking stock PR1.3, no CSSU, no nothing): One day I was in the lift (aka "elevator"), looking at my display, when suddenly an alarm popped-up (on the display, still no sound, usually takes a second or two to start ringing). Given that I was actively looking at the display, when I saw the alarm pop-up I instantly tapped on "close". The alarm UI closed, but then the ring started sounding, with no UI to turn it off. Given the "urgency" of the situation (other people were looking at me as if I was just trying to bother them , I resorted to turning off the N900 by holding the power button for a few seconds. Obviously there's a race condition somewhere, but I didn't bother investigating further (alarms usually *wake* me up, so I'm never so quick so as to reproduce the bug). Perhaps you can have a look? (I will myself take a look at the code, but don't expect that I will find the bug, assuming it's in osso-systemui-alarm.c. Thanks in advance!