This might be a duplicate of bug #974620.
Switching off the hardware acceleration or using the workaround in https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/974620/comments/3 both works for me, but the latter makes the flash plug-in quite unstable (as mentions in the comments).
This might be a duplicate of bug #974620.
Switching off the hardware acceleration or using the workaround in https:/ /bugs.launchpad .net/ubuntu/ +source/ nvidia- graphics- drivers/ +bug/974620/ comments/ 3 both works for me, but the latter makes the flash plug-in quite unstable (as mentions in the comments).