If you were on the website late Wednesday into Thursday ET, you may have had issues with slow page loads, logging in and posting. The performance issues peaked around 6-7 PM, at which time we began investigating. After some log analysis and server monitoring, we determined we were being attacked, specifically on the Forums, our Blogs and Economic Calendar. Luckily, the attack was coming from a single IP address, which we blocked. There's no indication that this is related to the widespread attacks affecting the East and West Coast of the U.S. and parts of Europe.
We'll continue to monitor our servers and make updates to our security infrastructure to minimize the affects of future attacks. Thanks!