I've noticed you can only be logged in on the website on one device. Also, seem to get logged out after a certain time even if remaining active on website.
This isn't large inconvenience or complaint but think its funny that gmail seems to stay logged in on my computer forever but I have to log dozens times a day at Scirra just to post/check the forums. (which of course I would be much more concerned about someone accessing my gmail account than my Scirra account).
The real annoyance is when typing up a post in the forums, showing that I'm logged in, then when pressing preview or submit it takes me to the login screen. When pressing back, either before or after logging in, the text is lost. I swear I've been on plenty of websites where if you navigate away from a page, lets say accidentally, you can press back and the text is not lost. Also, if I accidentally navigate back (press delete key outside of field) when navigating forward the text is lost.