  It has been recently debated whether a class of generalized uncertainty
principles that include gravitational sources of error are compatible with the
holographic principle in models with extra spatial dimensions. We had in fact
shown elsewhere that the holographic scaling is lost when more than four
space-time dimensions are present. However, we shall show here that the
validity of the holographic counting can be maintained also in models with
extra spatial dimensions, but at the intriguing price that the equivalence
principle for a point-like source be violated and the inertial mass differ from
the gravitational mass in a specific non-trivial way.
