you have selected Safari as the Default Browser in the General Section.
Failing that, check Eudora prefs and see if there is anywhere in there that you can specify a Non-Windows browser
Macbook OS X 10.61
When I click on an email link (Eudora), instead of opening up a tab in the currently active browser, Fusion is executed and Windows OS launched before a browser is launched!?? Is there no way to specify in OS X what should happen if one clicks on an HTML link?