I have just endured this problem. I've tried everything, and when I unplug the charger from the USB connector, my screen goes to landscape mode and is stuck there. Phone is out of warranty. It was recommended to get a can of air and blow out the USB socket, and it seems for some that worked. Not for me. Tried different cords, different batteries, neither of my two captivates will connect to any Windows 7 PC, not recognized. One is 2.3 Gingerbread, one cannot upgrade because it will not connect to Kies Mini. I cannot resolve the landscape mode problem, now that I have resolved the Tethering issue and the Car Dock errors by doing a factory re-set. Only lasts for a while then back to landscape mode when I recharge battery. Time to get another phone I guess, but I will be skeptical of Samsung as they won't do anything out of warranty for less than $70. They said it was an old phone... July 2010? I've used phones for 6 years with no problems... of course it was an old razr.