I've noticed that I cannot export to a network drive (with or without spaces in the path), but can always export to a local drive (with or without spaces in the path). Whenever I attempt to export to a network location, ArcMap will crash and shut down. When I check the network location, all of the files are there (axf, shapefiles, etc), EXCEPT the APM file.
My temporary work-around is to save to a local directory, but hopefully ESRI addresses this in an upcoming patch.