I'm having issues with it too. I think the massively increased load must be causing the interface to misbehave. Nothing like finding all the bugs when volume is high. fun!
Anyway, I tried yesterday to find a post/thread that I'd commented in. No amount of sorting in that community was bringing it up. I could only find it by following the comment link in my profile. So right now, I have the feeling that I'm missing a good bit of content. I'm hopeful that they've noticed these issues and will see how they can rectify them eventually.