Hi ircdirk,
I have same drastic fall of fps (100+ > 15), but for me it's just if i have Carbonite Quests module on.
If i disable Carbonite Quest and enable just Carbonite Maps i have good fps... i don't know if this information can help you but...
Thanks for support this fabulous addon
(Sorry for my bad english, i'm french and...it's difficult hehe)