There is a small, but noticeable delay in mouse cursor movement since the noticable 1.8.232 patch on Linux x64.

The multithreaded system adds an inherent 1 frame lag to rendering, We'll see what we can do about it.

It's not totally disabling or anything. I just thought it was worth mentioning.
Some other apps have done this for a long time and it's not any less usable (XBMC fullscreen for example)