Thanks for the tip. I tried checking to see if Java was enabled, but I couldn't find where to check that. Would you know where to look?

I've been having trouble with this feature since they went to the new style comments. Even though I am logged in, when I try to comment on an article, I see a tab asking me to sign in. Signing in again does nothing. I am unable to comment any more. This happens from the couple of computers I try to use. Anyone know how to fix this?