Topic on Project:Support desk

We've got ImageMagick doing a horrible job at resizing images. For example:

This problem exists for all resolutions of the images, however, of course, the full resolution image is fine.

Any ideas on how to fix this? Are there any parameters I can try?

Configuration
MediaWiki 1.17.2
PHP 5.2.11
MySQL 5.0.67
ImageMagick 6.7.0-8

This post was posted by Dcigary~mediawikiwiki, but signed as Dcigary.