I do not recommend updating any system using firmware from a different region.
We separate the websites by region, with that as one major reason.
Have you tried changing the batteries in the glasses, or attempting the 3D Picture Correction option in the menu?
I own a UA55C8000 LED 3d and live in the UAE. Im having some problems with ghosting issues in 3d content and I've heard the ghosting improves alot on the new sotware upgrade. I tried upgraing from the TV directly and it says no updates available and i have the latest, when I go the US website i see an update that is much more recent than mine. I could upgrade the firmware with a USB but will it affect the TV since I live in another region??? is it OK???