This only occurs under specific circumstances, and isn't a big deal, but I thought I'd mention it.
If I load up www.gideontech.com
and look under "Recent Topics", I right click and open ones that interest me in new tabs (using Firefox 18.104.22.168). If I close the first tab (call it thread A), then decide that I want to reply to the second tab (thread B), I have to login. When I do so, I am redirected to thread A, instead of thread B. Not sure what would cause something like that, but it's strange. Only really happens to me when I'm at work since the browser there doesn't retain cookies and I have to login every time.