This is more of a look for confirmation than anything...I suspect that it's just my 3GS that's doing this and not an issue anyone else will really have or it will be limited to only a couple of people or something. Does your GPS work on your 3GS? Does it track you properly...as well as the 3G did? Basically...the GPS doesn't work right. When it is able to pinpoint my location (where there is no blue circle showing the estimated range)...it can't accurately track in Google Maps...it'll pop up once...and after I move it might update once every 30 seconds or so. Most of the time it can't establish that high of a confidence level though...so it has a huge estimation circle around it...and again it only updates like once every 30 seconds...if that. It does work for brief times...maybe a minute at a time...but the location will show me driving through the middle of a neighborhood I'm driving by...or through a lake I'm passing. Basically when it's able to track...it is tracking inaccurately by like 200 feet. This is done while in my Belkin TuneBase FM...or just in my hand (did this to confirm it wasn't the TuneBase interfering)...doesn't matter. Now keep in mind my 3G works just fine...tracks just fine from the same positions under the same conditions. Also took my phone out of my case (Contour Flick)...just in case...and again, no difference. My 3G of course, had no issues with my Flick. My 3G could, of course, easily track my movements. Doing 80 down the tollway was no problem. Not really robust enough to do turn by turn...but for basic tracking it was accurate and responsive. No matter what I get here...I'll be taking this up with Apple...just want to see if anyone else has experienced this. Also note: I did have the LCD replaced for a uneven warmer screen (a yellow screen) the day after I got it (had LCD replaced last Wednesday)....and I did not test the GPS before having the LCD replaced. So I suspect either the unit is defective to begin with...or when it was reassembled something was done incorrectly, causing the GPS to malfunction. In it's current state is definitely unacceptable by any standard.