In my office I have a lovely 23" monitor which I plug into.
I have loaded Revit 2013 and 2012.
Of course with my laptop my main monitor is the 15" laptop screen and the larger 23" monitor is my secondary screen. I like to have Revit open on the "Big" screen to work on so I drag Revit onto the bigger screen and whenever I open Revit it opens up on the 23".
When I select a component in Revit 2012 my view does a slight "Jitterbug" ... and if the "Press and Drag" icon is checked in Revit whatever you just picked stays where it is while the rest of the screen does this little "Jitterbug" which in affect moves the selected object... quite annoying really!
This doesn't happen in RAC 2013!
So.... after asking around the office to see if anyone has ever came across this issue (as I have never seen this before!) I find out that everyone who has dual monitors here had the same issue.
It was due to the fact that the smaller monitor is set to be the primary monitor and when you set the bigger screen to be primary where Revit will reside it works fine!
I would never have guessed and would have chased my tail thinking it was a graphics issue.!!