Quote Originally Posted by mgraesslin View Post
This is a bug in Aurorae which got spotted last weekend, while the patch is already finished it was too late for 4.9.0. Switching to any non Aurorae theme will fix this issue.
I just tried different ones, but it doesn't help.

Now before someone asks: no I don't move windows through the titlebar. I use the window content area or alt+lmb, so no I did not spot this issue.
Just tested that. This has the exact same issue here. Alt + grabbing and moving in the middle of a window shows the same lag.

I'm using the 302.17 NVidia drivers on a GTX 560Ti, btw.