Topic: NTFS USB HD and fresh Statler install
OK, so if you install CrunchBang (possibly other Debian-based distros?) while you have a NTFS (possibly FAT32 as well, haven't tested this) USB hard drive plugged in, it automatically gets added to fstab; as a consequence, any drive that thunar attempts to auto-mount as that device (e.g. sdb1) results in a "Failed to mount" dialog; "ntfs-3g-mount: user has no write access to mountpoint /media/usb0" (or whatever mountpoint it was assigned in fstab).
The fix? Just remove the offending line from /etc/fstab. No need to even logout!