Notification about bug 528753 received by a subscriber to bug 58753

This is very strange. I've received a notification about bug 528753 because I am a subscriber to bug 58753. How should I report this - against which project? See the text of the email notification below.

Regards,

Ken

On Sat, 27 Feb 2010 00:02 +0000, "Anzenketh" <email address hidden> wrote:
Subject: Re: [Bug 469618] Re: Kernel oops when inserting a Usb camera with usb
 audio (pulseaudio related)

> *** This bug is a duplicate of bug 528753 ***
> https://bugs.launchpad.net/bugs/528753
>
> Thank you for taking the time to report this bug and helping to make
> Ubuntu better. This particular bug has already been reported and is a
> duplicate of bug 528753, so it is being marked as such. Please look at
> the other bug report to see if there is any missing information that you
> can provide, or to see if there is a workaround for the bug.
> Additionally, any further discussion regarding the bug should occur in
> the other report. Please continue to report any other bugs you may
> find.
>
> ** This bug has been marked a duplicate of bug 58753
> display: fixed elements displayed improperly when scrolling up
>
> ** Changed in: linux (Ubuntu)
> Status: New => Confirmed
>
> ** This bug is no longer a duplicate of bug 58753
> display: fixed elements displayed improperly when scrolling up
> ** This bug has been marked a duplicate of bug 528753
> Kernel oops when inserting a Usb camera with usb audio (pulseaudio
> related)
>
> --
> Kernel oops when inserting a Usb camera with usb audio (pulseaudio
> related)
> https://bugs.launchpad.net/bugs/469618
> You received this bug notification because you are a direct subscriber
> of the bug (via bug 58753).
>