This just started today. I have a "topic preview" whenever I hover my cursor over a thread's main navigation link. (in 3 different browsers, whether signed in or not) It is really very distracting. Is this something new, and if so, can I turn it off.

I enabled it to ...preview it (see what I did there).
I don't know if users can turn it off or not. If not, and if the general consensus is that we hate it, I'll turn it off, again.

Let me place my vote for "Hate it" right now.

It's gone.
It didn't appear to work consistently. It wouldn't be there at all, then it would, then on the next I hover over it would fail to load, again. That's not worth even trying.

Didn't work out, but I appreciate trying new things/functions on here.