Might be dependent on the version you use, I'm still on version 3 as it gets support till next month, then I'll have no choice but to upgrade like everyone else. But it's fine, I can use Opera and all that for that, though even in the past I barely used the rating system. Just wanted to make sure I had it handy if I find a particular topic outstanding.
I can rate your posts just fine, +1 you with no issues at all. Perhaps a cache clearing may be in the cards.
Edit: cleared cookie for this forum, nothing doing. If I need to rate something though, I have Opera.