[mythtv-users] Specific show not leaving 'currently recording' in mythweb

[f-myth-users at media.mit.edu]

    > Date: Thu, 28 Apr 2011 10:31:04 -0600
    > From: Joel Donahue <joel.donahueis at gmail.com>

    > On Wed, Apr 27, 2011 at 1:39 PM, Michael T. Dean
    > <mtdean at thirdcontact.com> wrote:
    > > On 04/27/2011 01:24 PM, Joel Donahue wrote:
    > >> I have a specific show that every time it records and finishes, in
    > >> Mythweb it is shown as "currently recording." If I restart the backend
    > >> the status is fixed. But it's consistently doing this every time it
    > >> records, and it's only happening to this specific show. If I don't
    > >> restart the backend it will stay that way for weeks until I finally do
    > >> restart it. mythtv-status does not show the problem and all the tuner
    > >> cards are shown 'idle' so it's something unique to mythweb. Any ideas
    > >> on where to start trouble shooting? Thanks
    > >
    > > Pretty sure it's a broken recording rule.  Just cancel the rule (set it
    > > to not record, so it gets deleted), then re-create it.  Once you do,
    > > future recordings should work properly.

...what exactly breaks such that doing this fixes it?