If I associate an Ant Builder with my JSF Web Project, and have a compile failure in my Java code, then the Console provides a handy mechanism whereby I can click on each failure as a hyperlink. When I click on the link, and the offending Java source file is already open in my editor, it will open up ANOTHER java source editor for the file, which is redundant.
This might be because my Java "src" folder is in the WEB-INF folder. I don't know.