For my morning channel I link to a number of JPGs from the NOAA Aviation Weather server.  These are updated every day, and look ok on the little Chumby display.

But, (always a but isn't there), since the restart they appear to be cached.  And I get the same one day after day until resetting the Chumby.  Is there a magic argument I could add to the URL, like &rnd=[random] to force it to skip the cache? Or just a "Reset Cache" widget?

Thanks for any help on this.