general advice for rolling back yum updates?

[Patrick O'Callaghan]

On Sun, 2010-02-28 at 10:47 -0500, Mark Andrew Miller wrote:
> Hello, all.
> 
> I recently ran a <yum update> on my mythdora server, which updated my myth
> applications from 0.22-1 to 0.22-5.  Now the mythfrontend application
> terminates right after being launched and the log ends with
> 
> 
> 2010-02-28 10:27:10.774 Registering Internal as a media playback plugin.
> Floating point exception
> 
> I have written to the myth users list, but I thought somebody on this list
> might be able to give me some advice, too.
> 
> Since the previous version of the myth apps ran pretty well for me, I would
> like explore the possibility of going back to that version.  However, I
> don't have any experience rolling back yum updates  If rollbacks require
> some before-the-fact configuration, I probably don't have that :-( 

Try 'yum downgrade <list-of-apps>'.

poc