[TYPO3-english] jb_gd_resize does not resize pop-up image

[lists.typo3.org]

I am using the extension jb_gd_resize since imagemagick is not available at 
my webhost. It works fine with ordinary images in image text content 
elements. However, the pop-up images with click-enlarge property is not 
resized. The pop-up image is only partly shown since it is not resized to 
fit in the pop-up window. Anyone who knows what to do in order to force 
jb_gd_resize to resize the pop-up image?

Regards,
Gunnar Jonsson