Took a 1500 mile road trip this weekend, and found my GPS to be very frustrating. On the trip TO, it got me about 3/4 way with no problems. iPhone docked, and G-maps and Google maps tracking me perfectly. Once AT destination, I had almost no tracking ability. I compared my 3GS to my sisters 3G, and I had a 4 block radius, and she was spot on. On the trip back, I had about 20% functionality. Fuming the whole drive home, I was preparing my battle plan with Apple. After arriving back home, I restored my phone, and voila, perfect tracking. Excellent! 24 hours of testing, and it was spot on. Decided to Jailbreak again (which is why I am posting here), and boom! Back to the same shoddy tracking.I have not installed SBsettings, or Springboard. Anyone else have a similar experience with their GPS?? Also, my battery life is 2X better not jailbroken.