I have been using this for a while on my Sony Ericsson Xperia Arc S as an alarm clock. However, recently, the alarm has been disabling itself during the night and it is no longer usable as an alarm clock.
The only change to the phone has been the installation of the Pulse app, but I have made sure that doesn't do anything in the background and the alarm still fails.
Has anyone had this issue? Any suggestions on how to fix it? I've done the usual google searches but nothing comes up.