I've been using the same gunsight ever since the transparent sights were introduced and never had one issue with it in all this time until the update.
When I am zoomed all the way back in my seat, the mil horizontal ticks stretch out to the bottom of the gunsight reflector.
When I zoom in the gunsight is okay without any corruption.
It happens on both of my systems but since this is the one I primarily use for playing AH, I'll list this computer specs instead.
WinXP SP3
Core 2 Duo 6420 OC'd to 3.0Ghz
2G RAM
ATI HD3850 512meg w/Catalyst 9.7 drivers @1440x900x32bit
AA: Application Controlled
AF: Application Controlled
Catalyst AI disabled
DirectX 9c
ack-ack