[Chameleon] PrintProduction error

[Ken-ichi]

Hi all.  I just started experimenting with the PrintProduction widget, 
and whenever I click the Printer Friendly Map button, I get the 
following error:

Fatal error: [MapServer Error]: msPrepareImage(): Unable to initialize 
image. in 
/usr/local/chameleon-2.0/htdocs/widgets/PrintProduction/production_draw_legend.php 
on line 396

This occurs in the Enhanced Sample (inconsistently) and within my own 
application (every time).  I tried subbing in the sample's legend 
template for my own but that had no effect.  It seems a weird place for 
it to get hung up, since the prepareImage() function just generates a 
blank image handle.

Any ideas?

-Ken-ichi