Quoted from kapsreiter:
when i run the macro i have always to answer some questions" weird to define a palette for not full screen image" but this images will be shown in color only when i color it on ST ?!
Most of the time it is useless to define a palette in a frame that will not fill the entire dmd.
This palette won't be used (it's the palette of the underlying background that will be used instead).
The rule is that SmartDmd will only use the palette information that is stored in the top-left corner of the final dmd image. An animation frame (that is often a 'sprite') will generally not follow this rule.
This message means that Pinball Browser might have detected such a situation.
See also here