Strange issue with rmagick

I’m having a problem on my production site where rmagick won’t resize
images. The code works on my local machne so I’m wondering what the
issue could be.

WORKS:

Development: Rails 2.0.2, Rmagick 2.1.0, Imagemagick 6.3.7, OS: Debian Sid
vince@debiansid:~$ identify -version
Version: ImageMagick 6.3.7 12/30/07 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC

NOT RESIZING:

Production: Rails 2.0.2 Rmagick 2.1.0 Imagemagick 6.3.8 OS: Ubuntu Gutsy
vince@gutsygibbon:~$ identify -version
Version: ImageMagick 6.3.8 01/22/08 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC

The code is the same on both machines. I don’t recall how I compiled
Imagemagick on Debian but on Ubuntu I ran sudo apt-get build-dep
imagemagick, downloaded the tar, ran …/configure make and sudo make
install.

Can anyone give me a pointer as to where to look? I’m pretty much
stumped…

-Vince


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