Just recently ST4 has started taking extra time to complete drawing lines etc, and i have to wait for the focus to return to the cursor so i can continue drawing.
I realize that this could be related to any number of things local to my computer, but thought i would throw it out there in-case it's a SE2D thing.
Looking at CPU usage while waiting for lines to finish shows edge.exe*32 sucking approx. 50%
This is not related to file size and does not effect things like panning.
Don't worry guys, problem solved. I just deleted temp files, and removed a few programs from start up and all good again. I really need to get into the habit of deleting temp internet files regularly cause it catches me every time. Pete