What is wrong with Fluther (details inside)?

It seems that Fluther was down a couple of hours ago. Now the site is up again, but it seems that some problems still remain: I went to www.fluther.com using Firefox like usual and received the “over capacity” error page. I googled Fluther and clicked on the Fluther result only to be brought to the same error page. Only by clicking on the sub-tabs below that Google result (social, just for you or guidelines) could I get to the normal site. When on the normal site, I clicked on Dr.Jelly and I was greeted by the error page again!
Oddly, this issue only happens to Firefox. I used Google Chrome and did all the same things above but the error page did not popped up.
Can somebody tell me what’s that all about?