I don't think its an error, its a normal function of a program for the icon to bounce when it has something to tell you. For example, when there is an error message in Finder the Finder icon will bounce, when Firefox has a dialog box that wants you to hit ok, that icon will bounce, etc. When Apimac Timer has a timer go off, its an alert, and it makes sense for the icon to bounce. I don't think its a glitch. But it does seem that some programs have a setting for it and some don't, so that's why I was wondering if there's an overall setting for that as an alert option.