Has your TomTom GPS let you down over the past few days? Then it looks like the company may have pinpointed your problem. It confirmed today that a leap year bug is preventing at least some models from obtaining a GPS position -- something that has apparently been occurring since March 31st. Exactly which GPS devices are affected isn't clear, with TomTom only saying that a "limited number of models" have been experiencing the problem. Unfortunately, the company doesn't have a permanent fix just yet, but it says that a hard reset of the device will temporarily resolve the issue if you find yourself in a pinc