If you don't have firefox-webdeveloper installed, you're probably seeing bug #194486 in firefox-3.0.
This bug in webdeveloper is more or less "fixed" now, because the package depends on a version of the firefox package no longer available in hardy. So I'm unmilestoning the bug, but am still leaving it open so that it's a visible reminder to anyone who updates firefox-webdeveloper for firefox 3.
If you don't have firefox- webdeveloper installed, you're probably seeing bug #194486 in firefox-3.0.
This bug in webdeveloper is more or less "fixed" now, because the package depends on a version of the firefox package no longer available in hardy. So I'm unmilestoning the bug, but am still leaving it open so that it's a visible reminder to anyone who updates firefox- webdeveloper for firefox 3.