This is a bug introduced by the border algorithm which is not yet functional.
By setting "padding around each image" to 0 on the admin/settings/image_composition page this warning will disappear.
I hope to find time to solve this because it would make the module more attractive.
Comments
Comment #1
clemens.tolboomThis could be fixed by removing the setting for border width to 0. It's a waste but better then having an error.
Comment #2
clemens.tolboomComment #3
clemens.tolboomComment #4
dman commentedClosing old (D5) issues