this is more annoying than a problem, GParted (v 0.2.5) has automount disabled, i've checked the existence of gparted-disable-automount.fdi & it's not there, i also verified that Automount (FAT32 & NTFS) was installed in automatix, removed the "no" from "noauto" in the fstab from the USB pen entry, and tried modprobe -r ehci_hcd but none have enabled automount BTW: the partition on the USB pen is FAT16 libparted version = 1.7.1 BTW: not that it matters that much, but i'm on Kubun Feisty
I personally had automount problems after installing the fat32/ntfs feature in Automatix. Try to remove that feature.