I had a user who reported when she tried to use Visio on our Citrix farm; the graphics were slow and jumped around.

At first I thought it might have been a resolution setting as some of our users have rather nice monitors and set the resolution really high. But this was not the case.

A passing thought was if “snap to grid” was set on Visio.  It turns out it was. She disabled it and everything was on her way.