TYPO3 Core

I used the following configuration to dynamically resize image:
file.width = 50
file.height = 50
This configuration worked well and resized all images with the 50x50 dimensions.

Then, I tried the following configuration:
file.width = 100
file.height = 100

Some images disappears:
Eg:
- 430px × 430px original size image appeared
- 195px × 273px original size image did not appear
- 319px × 446px original size image did not appear and the html returns <img width="" height="" border="0" title="Soiree" alt="Soiree" class="cw_thumbnail" id="thumbnail_big" src=""/>

I tried to change the version of PHP, Image Magick,... but the problem stays unresolved.

My configurations are:
- localhost on mac os X 10.5.8 server
- Image magick 5.5.5 and GM 1.3.7 under /usr/local/bin
- PHP 5.3.0
- TYPO3 4.2.9

Thanks.

(issue imported from #M12256)