I wrote that all three extensions by AE Creations are compatible with Firefox 3 which was released last Tuesday. Turns out I was wrong -- at least for Panic Button. I don't know if this has something to do with the fact that Panic Button is in the Mozilla Add-ons sandbox, but changing the target application max version to 3.0.* didn't have any effect for that extension.
To get around this, I quickly built and uploaded a new version of Panic Button, numbered 0.9.3.1, to Mozilla Add-ons. The only change to it is in the install manifest, where the maxVersion was incremented to "3.0.*".
This update is now available on the Panic Button page on Mozilla Add-ons. I will no longer be providing download links here on this blog, as I've been finding releases to be harder to manage when I have them linked from three different places and uploaded to two different download servers.