[mythtvnz] Can't run mythtv-setup

[Jim Cheetham]

When I try to run mythtv-setup, I get a nice themed page telling me
about these errors :-

{{{
Card 13 (type DVBInput) is set to start on channel 1036, which does not exist.
Card 14 (type DVBInput) is set to start on channel 1930, which does not exist.

Do you want to fix these problems?

Yes please
No, I know what I am doing
}}}

Selecting "Yes please" doesn't work, as I'm immediately dumped back at
the same page (a slight flicker on X tells me that it's been redrawn).
Selecting "No, ..." doesn't work, as mythtv-setup then exits (asking
me to run mythfilldatabase, etc)

In /var/log/mythtv/mythbackend.log I see

{{{
2009-03-26 21:06:10.395 DVBChan(13:1) Error: SetChannelByString(1036):
CheckChannel failed.
                        Please verify the channel in the
'mythtv-setup' Channel Editor.
2009-03-26 21:06:10.418 DVBChan(13:1) Warning: Your frequency setting
(12483000) is out of range. (min/max:950000/2150000)
2009-03-26 21:06:10.428 ChannelBase(13) Warning: Setting start channel
'1036' failed,
                        selected to '1036' on input 'DVBInput' instead.
2009-03-26 21:06:10.439 DVBChan(14:0) Error: SetChannelByString(1930):
CheckChannel failed.
                        Please verify the channel in the
'mythtv-setup' Channel Editor.
2009-03-26 21:06:10.450 DVBChan(14:0) Warning: Your frequency setting
(12483000) is out of range. (min/max:950000/2150000)
2009-03-26 21:06:10.461 ChannelBase(14) Warning: Setting start channel
'1930' failed,
                        selected to '1930' on input 'DVBInput' instead.
}}}

Now, originally the channels that were discovered from the dish
(Freeview) were numbered "1036" and things like that. I changed them
to "1", "2", "3" etc ... by using the mythweb interface. Obviously
I've broken something along the way ... but where can I go to fix it?

-jim