Just a theory here but, I'm wondering if the FPS loss that some of us are experiencing is due to Carbs settings, or more specificly the way we have Carb set up. I run more or less "out of the box" settings. Minimap not merged with the carb map, herb and mining nodes imported, and I don't use the Carbonite Social window.
I can't really think of anything else that could be causing the issue. It would seem by the other thread that at least some of us are experiencing around a 30% FPS drop with only carb enabled. But without actually listing everyone's setup of Carbonite then this could be an elusive bug (and listing everyone setup could be even more of a pita). I'll play around a little more and try a few different things with Carb tonight and tomorrow and see if I get any different results though.
Edit:
So I did a little playing around quickly. All I did was disable carbonite take a screenie, enable carbonite take a screenie, and enable carbonite but disable every option within it and take a screenie.
No carbonite enabled:
Carbonite as I normally use it:
and with all options disabled:
All I did was play with carbonite to reduce the number of things that could change. To be honest the FPS loss doesn't really bother me much normally since I run with Vertical Sync enabled. But I have to admit with the silence of the devs, and clear evidence that there
COULD be a problem I am forced to think that carb may be on it's way out. Hopefully just to make room for a Carbonite 2 or some such though