A little while back I switched from a wheel magnet based bike computer to a GPS one. This was mainly to make it easier to track my running and biking with a single device (read: toy). I had a couple of odd runs before I figured out that you have to wait until the signal is strong (correct number of blinks per minute) before starting off. Now though, I'm having a different issue.
Simply put, the GPS doesn't like my place of business. I can sit outside my building for 10 min (and I have) waiting for the signal and it won't come through. On multiple occasions I've given up waiting and ride the short distance (0.6 mi) from the building to Jack London Square and re-tried, only to get a connection in about 30 sec. Annoying, if not actually significant.