Here's some more information that probably is random and not relevant:

I just tried logging in to my other character (Was in Uldah) and got on just fine. Ok. So I logged out and switched to my main character (Was in La Noscea) and it happened again. Before it was happening in Southern Thanalan, so I doubt where my character is is an issue.

To make sure my character for some reason wasn't cursed, I logged on him on my bro's computer and everything was just fine.

I'm so confused...