Mine is doing this too, starting sometime recently. I thought it might be in the security of my browser, even though it only happens on the disboards, so I looked up a way to change the security options in the browser itself that might fix that. It didn't help it at all so I'm guessing that means it's coming from the website. (Disclaimer: I know basically nothing about computers except how to type so I'm definitely guessing here.)
I wish somebody would tell me how to fix this! I'm planning a trip and so I want to be on the boards a lot but this is driving me crazy and I get fed up after reading like two posts. Help!