Apologies if you are having difficulties connecting or are getting signed out. This is due to a lot of activity crashing some services. I've increased resources so that should help.
Thank you Webmaster.
I had noticed that there was something wrong like last time it happened.
Apologies again for the site being slow and unstable these last few days. It turned out it was due to Facebook's crawlers hammering the site.
I will be making a few changes over the next 24 hours but the site should still be up and running. You may get signed out again every now and then, so sorry about that and it's OK to just sign back in.
Technical details are here for anyone that wants to know more.
https://stackoverflow.com/questions/11521798/excessive-traffic-from-facebookexternalhit-bot