For me, Crossfire gets disabled after waiting/sleeping, and certain dialog. Alt-tabbing out and back into the game fixes it.
Renaming to oblivion.exe fixes the CF issue but it also screws up HDR (light level doesn't adjust properly when you look from the ground to the sky, for example).
Renaming to oblivion.exe fixes the CF issue but it also screws up HDR (light level doesn't adjust properly when you look from the ground to the sky, for example).