display file extensions?

[pss]

is there a way for aperture to display the actual file extensions? (.dng, .tiff,....) i never see any in either browser?
also: when i try to delete a version, a window pops up telling me that i am deleting the master and all versions (which i cancel out of, of course)....not sure what is going on there....i understand that there is a delete master command and a separate delete version command (which i cannot seem to get to?)
any help welcome..thanks

[johnbeardy]

No