The little red ribbon in the top-right corner of the screen that indicates new responses in my topics is stuck there. Like, I when I click on it, topics listed are old and haven't been responded too.

This happened to me once and I reported it and it got fixed, though I'm not sure if they fixed it or if it went away on it's own accord.

I have that with messages

While I'm reporting site problems, I'd like to mention that the "My Account" page loads painfully slow, as opposed to the rest of the site.

To be fair - this has been the case for me from day one. I don't think it's new.