All this stroboscopic display flickering is my main concern with the 1.8 driver.
For example - visit www.icloud.com - make sure you're at the login screen (i.e. logout of icloud if you're logged in). Move you're mouse around a little and enjoy your ensuing epileptic fit...

I see no screen flicker on the login screen on icloud.com

I admit that this driver has it's share of issues, but I just don't see this one.

OS X 10.8 video flicker
 

i have same issue. i have to keep one monitor plugged into the thunderbolt port, bypassing the display link, just to watch videos. it needs to be fixed...