This problem is now solved! The paid versions of Run.GPS have been updated in Android Market yesterday evening and the free versions (including licenced TRIAL version) will be updated today.
I have the same problem with my Acer Liquid E running on Android 2.2.
I used to have an Acer Betouch E101 running on WM6.5 and never had problems with rungps.
I think there´s a conflict between Rungps and Android. I hope the problem will be solved soon!