I found the best chm viewer I've used yet on Linux. It's an add on for Firefox 3. https://addons.mozilla.org/en-US/firefox/addon/3235 You can't shell to it. You have to use a Firefox menu Item, after installation. It displayed flawlessly some chm files that none of the others I've tried could handle. Maybe this will give the developers another angle to try instead of the current faulty one?? James