In the Acunia test suite, in IAA.ChangeUserSim test, when you click on a user name, a window will popup with the selected user name and an "OK" button. However, the window's size is wrong, since the button doesn't fit completely inside the window. This could be a font size problem.
Yes, this is most likely a font size problem. In fact, there are problems all through our AWT implementation with font sizes. We'd been assuming that Pango works with pixel sizes; instead, it works with point sizes, so the DPI of the monitor must be factored into (pixel-based) AWT size requests. I have a patch for this -- it's at home with my AWT 1.0 event model work -- that I'll check in later.
Fixed on java-gui-branch.