@beansquezada:

I'm able to vote now. Don't know if it was something to do with the new interface or something but I cleared my cache and cookies and logged back in then it worked.

SOLVED !!
I was using Firefox and the problem ocuured. (no "Please Vote up to 5  … line)
I tried MSIE, and there was no problem, the message "Please Vote up to 5 categories which match this torrent best" appeared

so I deleted cookies on Firefox then reconnect to the site -> pb still there

I then deleted cache and reconnect to the site
It works now !!

I guess some change have been made in some javascript and my browser was still using an old one from the cache.

@Popper:

When you try to vote, is there any message displayed?

Sale issue for me :

When I go to the "uploaded torrents" page, I see the old one (with a thumb) that i already voted for, and the most recent one I haven't yet vote for.

When I click on a link without thumb, I got the classic torrent description page, but the vote link does not appear (as it used to) so i can't click on it
There is no specific message to tell why the vote link to not appears

I guess this problem come from the moment the description page has been changed with the new specific links
"Add Screenshots and Covers"
"Show all Pics"