Comment 6 for bug 274212

I've been using Alarm Clock to sound ships bells, which means that I get an alarm every half hour with appropriate bell sounds. It's worked well for months using Ubuntu 8.10.
I've just upgraded to ubuntu 9.04. (Alarm Clock 0.9.18). Now, after each alarm the icon flashes until I click to acknowledge it. I don't want this as it's distracting. This must be a change introduced at the upgrade. I can't see any way to turn it off, yet surely there is no reason to assume that every alarm needs this reminder to be acknowledged. Can it be turned off in 'Preferenced' anywhere?