Hi,
I'm running foxytag on a Blackberry 8800 (internal gps) and it seems to me that the screen is updating too slow.
A radar is correctly identified on the outer circle, but by the time you make it to the radar it still hasn't moved and therefore the audible alarm goes off too late.
Any chance of increasing the update speed?
Also the screen goes into standby as soon as you interact (like confirm a radar) with the program. As long as you don't interact the screen remains active, but as soon as you do the standby option of the phone takes over.