Starting on August 24th on Nightly 17.0a1 stopped working with Sticky Password. As of now the Aurora for today 17.0a2 and the nightly 18.0a1 both dated 8/29/12 come up with the same error as seen in the attachment.
For more information about the changes see http://www.ghacks.net/2012/08/22/mozilla-firefox-17-better-add-on-security-but-some-add-ons-may-break/
I think you may need to make some major updates to support this upcoming change to Firefox. Thanks.