When a drive is mounted (harddrive, usb, ...), the "run program" window is launched, just like I would run gksudo from terminal. This always happens (automount or not, thunar or nautilus). But only for one user. As a test I created another user where this does not happen.
No differences in /proc/mounts or dmesg that could explain this (to my knowledge as just a linux user, not a programmer or dev).
Any ideas how to resolve this or where to continue looking?
Linux Mint 14
Also asked on https://forum.xfce.org/viewtopic.php?id=8336 where the easy fix was to migrate to the new user.