I'm receiving a "Sorry, your login credentials were invalid" message whenever I attempt to post a comment in response to the latest Weekly Buyer's Guide: High End System article. I'm able to login into the forums without any issues so it's safe to assume that the login and password I've entered is not the cause of the problem. The previous attempts I've made were accomplished on a work computer. I'll try again on my home computer as soon as I get off work.