In the sequence of http://issues.ez.no/19666 #019666: Usage of custom classes in embed images , it would be useful if one could restrict some classes to be selectable for embed image tags only.
The way it works now, the list of AvailableClasses selectable for images will also be available for all other embed objects. (Given that the classes need to be in [embed]AvailableClasses for the selection to be saved)
Site developers would benefit from being able to disable editor's from selecting image classes when embedding pdf files (for instance).
Note: for classes I mean css classes (as selectable in the edit embed object popup)