Using ImageMagick in a Jail

I'm trying to get ImageMagick to run inside a jail, specifically to get
PHP's Imagick PECL package going.

I am assuming the behaviour I am seeing when I run "convert" inside the jail
is responsible for the problem.

Run outside the jail, "convert -list format" will show me a bazillion
formats read to go.

Inside the jail, I only get "* native blob support".

ImageMagick 6.2.8 04/17/08
Centos 5.3 / 2.6.18-164.el5PAE

I'm pretty familiar with basic jailing, and have apache and a few other
things running happily inside the jail, but I'm still quite new to this.
I've done an "ldd convert" and copied the appropriate files over to the
chroot's /lib/ and everything seems to be fine.

I've tried following the bottom of
http://www.imagemagick.org/script/advanced-unix-installation.php concerning
ldd and ldconfig but with no luck.

Any suggestions?  TIA!