Hi,
Actually a great developer send me an implementation of the digital signature (originally I didn't have time to complete the implementation) but I didn't have time to commit the code yet. Please, could you wait until the end of the week, I'll try to commit the code as soon as possible.
Thanks for your patience,
Julien.
App.xml is not a constraint (delete it, without forgotten to remove the relationship in the /_rels/.rels part). If you have one relationship that PPT 2007 can't find (you made a mistake in the relationship part or you forgot to delete a relationship), it will considered as an invalid file ...
Good luck
Julien.
