DOCBOOK-APPS: pdfTeX and PNG images

This is only remotely DocBook-related.

I'm having trouble using PNG images with pdfjadetex.

| $ pdfjadetex ...
| [ boatload of messages ]
| libpng error: Application must be recompiled; version 1.0.6 was incompatible
|
| Error: pdfjadetex (file connections.png): png_create_read_struct() failed
| [ stops ]

Incompatible with what?  I have libpng 1.0.8 installed, but I don't see
TeX dynamically linked to that.

Looks like a botched installation.  I have tetex-1.0.7-7 as contained in
Red Hat 7.0.

Any ideas?

-- 
Peter Eisentraut      http://funkturm.homeip.net/~peter