I've been having the same issue for over 7 hours so far-and I just tried again. Sometimes the main forum page loads, but if I try to click on any folder/thread, the 400 error is back, at other times the error pops up without loading the main page. Gmail, Google search, Amazon, Dataviz, etc all seem to be fine. I've opened a tech support ticket, so I'll see what they say. Since none of you seem to be having a problem, I'm guessing it's something with my eDGe. Not sure what's changed since last night, though. I did end up downloading the update (before we heard it was just for registration problems), but I was able to access the forums after installation.