[Typo3-debian] Imagemagick 5.5.7 problems

[Cousins]

System: Debian, apache 1.3.27, php 4.2.3, mysql 3.23.56, GD2 with freetype, 
IM 5.5.7, Typo3 v3.5.0rc1

I need advice from anyone who runs IM v5.5.7 - I _had_ three working 
websites that were about to go live when the facility that hosts the 
machine moved to a new building and at the same time took the opportunity 
to upgrade a few bits and pieces. Unfortunately one of the upgrades was to 
move from ImageMagick v5.4.6 to v5.5.7 - now my images come out inverse of 
how they should. See 
http://trelissick.in-nz.com/Typoserver001/index.php   - NOTE: they were 
blue textured buttons with black text before- now they are black with blue 
textured text !!... I've tried going through the install routine and 
modifying various suggested masks to no effect - what I'd like to know is 
if anyone has 5.5.7 running properly - could they please advise the 
localconf.php settings they have used _and_ which versions of GD, libpng, 
etc they are using - the sysadmin has upgraded libpng which now actually 
allows the graphics to display - before he did this I could not get the 
pages to render at all in the browser due to broken libs.

Ian Cousins
New Zealand