I'm not having any problems logging in, and you were able to log in and create this item. If you can provide more information on what you see or what errors (if any) you are receiving, that would be helpful.
I am also having this problem. I log on using Google, go to my topic, but all I see is a hyperlink saying that I must be logged on and registered to reply. When I click on the hyperlink, it takes me out to the original logon dialog.
Obviously, since I am leaving this reply, I can logon, so I don't know what is going on.