Twice today after the latest update i completely lost GPS location. The GPS location icon didn't appear on the map at all, but when i clicked the 'Center me' button, it moved to what seemed like my location. I looked at the territory and the neighbouring territories, and it didn't look like i was actively mustering troops anywhere.
I had to restart to fix.
I may have something to do with the new 'run in background' feature, becuase it only happened when i allowed my phone to be locked.
On my way to work, i did not allow the phone to lock at all, and i didn't notice this issue.
Sorry i don't have more. This one is hard to pin down.
WP7 - Samsung Focus
OS ver. 7.0 (7392)