FPS Issue when running carbonite

[WoWLiving]

I have a Dell XPS8300 .. quad core I5 (2nd gen) processor. 4gig ram .. radon R6770.

when ever I am roaming around my fps fluxuates badly ... if I have Carbonite running when I am in a raid I get LUA error msgs to Disable all addons.

For example : Sha world raid I will drop down to 12 fps if I leave carbonite running. If I disable carbonite my FPS stays at 60 (I keep game with sync on so max is 60 - without sync I sometimes get a little bit of tearing .. annoying but not serious so I chose to leave sync on) .... but the point is that with carbonite running a difference of 50 fps is a big deal. (48 for all you picky ppl :P )

Anyone else having this issue ?????