Although I never had a major issue with free, stock-installed Navigation, I just had to satisfy my curiosity with other free navigation software on the Market. Sygic looked good, and purported to be free, but this I found out to be a lie (it's trialware) only after it consumed two hours downloading it's own set of maps, which did not appear to have installed successfully. I wasn't about to pay the steep fee for software which does not work, so I uninstalled Sygic, happy to continue using Navigation, when I found that Navigation could no longer find anything on any maps. Yikers - Sygic must have trashed the maps which I had been using! I have done the factory reset, but this hasn't changed my map situation. When Navigation attempts to find a starred address, it searches endlessly, never succeeding. Oddly enough, the Maps app still seems to work like a charm - it will find any place fast. Because of this, I don't truly know what got burned, only that Navigation no longer does what it is supposed to. Yes, I do have GPS enabled! What can I do to restore Navigation and my phone's map system to it's original state?