I was advised on GeForce > Community > Forums > Support > GeForce Drivers to post here with my problem instead.
I have a brand new ASUS Geforce 750 running on an older Dell Optiplex under Ubuntu 14.04. The kernel is the vanilla 3.13.0-24-generic #46-Ubuntu SMP and this is a 64bit install.
Based on incorrect results with the nouveau driver, I installed the 3.34 drivers as per recommendations.
Things seem to work really well with one major exception - running GMail under Firefox (I know not the world’s most intensive graphics application), where I experience a screen glitching that looks to my very untrained eye like two different graphic planes are struggling to be on top.
The easiest way to describe this is that when I click on a particular conversation, then return to my Inbox, I see a rapid flashing between the list of conversations in the Inbox and the text of the coversation I was just reviewing. After a few tens of seconds, this problem seems to go away; also I can usually make it go away by switching to another Firefox tab and then back again. Without waiting for the problem to go away or trying to make it go away, the application is mostly unusable.
Here is the nvidia bug report: