Contact
Try this link or write me at erich@acm.org.If you have a bug, please check here and here first. If those ideas don't help, please tell me everything you can about your problem: PC or Mac, exactly what you did, what else you tried, what you then saw, and so on. The more you tell me, the more likely I am to be able to help you and others.
If you have a suggestion for a new feature, great! Give the wish list a look to see if it's already listed. Even if it's there, please do write - your opinion counts. The more people want a feature, the more likely I am to add it.
If you prefer to not use email, you can log an issue. That page also lets you see the status of open issues. Closed issues can be viewed here.