Comment 2 for bug 76200

1 : This is understandable since pmount used previously shortname=mixed, and gnome-mount use by default shortname=winnt. In my opinion, the previous policy should not be changed.

2 &3 : This is due to the fact that all default settings are overwrite by the settings you define in the Volume tab in nautilus. The default for vfat is still uid=(user_uid). By removing all options in Volume tab and remounting your usb device, you'll see that.

Conclusion : the default shortname option for vfat should be change from shortname=winnt to shortname=mixed