While developing and testing a custom report listener, my standard report preview window began displaying incorrectly. The sides of the previewed page are "compressed" to about half the normal page width, and the rendered report objects on the narrowed page are correspondingly compressed. I then tried to run a non-listener-report preview, and the preview window did not display -- I got only a screen flicker when the preview window opened and then closed again instantaneously. Any suggestions on what I might have done to it and what I might check for?

TIA,
-mark