There is apparently a bug in Java's attempt at 2D hardware acceleration on certain platforms. It's *very* rare. We've had, probably, 3 or 4 users report it in 6 years of business. But if you're getting a screen that looks something like the one below, then try the solution here.

Edit the DSMLink short cut so that the Target line looks like this:

C:\Program Files\DSMLink\dsmlink.exe -J-Dsun.java2d.noddraw=true

To get there, right click on the DSMLink icon on the desktop and then select Properties.