It has come to our attention that the ImageMagick development team recently modified the commandline parameter requirements for their most recent versions. This causes ImageMagick 6.1.0+ to be incompatible with Gallery 1.x in some circumstances.
If you see errors, while using ImageMagick, that are similar to those described in this bug on SourceForge, then you will need to downgrade your version of ImageMagick to something below 6.1.0.
This error will be resolved in the upcoming 1.5 release of Gallery, and if absolutely necessary, we will release a fix for 1.4.4. There are no plans for a 1.4.4 fix at this time.
Please use the forums for any questions or related issues.