Please report bugs using the form in the file BUG-REPORT; the idea of this is to make sure that FSF has all the information it needs to fix the bug. At the very least, read the BUG-REPORT form and make sure that you supply all the information that it asks for. Even if you are not sure that something is a bug, report it using BUG-REPORT: this enables us to determine whether it really is a bug or not.