The first night with 2.00 patch 2 caused a significant frame rate reduction of nearly 50%.  Frame rates before the patch were typically mid-high 70s with an average of 78.  
Now, in clear air, above water with land in view in the distance, the forward view now produces a maximum of 44 frames per second.  In areas with many aircraft, the average has dropped to the mid-30's.  Several other people commented over range channel that they too experienced frame rate drops with this new patch.  Anyone else?
MiG
ASUS P4P800-E DELUXE 800/533/400FSB w/ P4  2.8Mhz
Radeon 9600 Pro
DDR PC3200 512k RAM
SB Audigy Platinum