Mozilla MailNews redirects to NS plugin finder

[Sebastian Sp�th]

Uhh, just  received a mail with pgp/signature attachment,
when trying to open it in mozilla, it told me unknown mime-type (or
something alike), and offered a "more info" button.
When clicking it the message window got replaced by the Netscape plugin
finder web page.
I can surely accept this behavor in NS6, but not in good old plain
mozilla.
Any bug numbers for this?

Sebastian