Does not mount or browse a removable drive when hot-plugged to USB port

[Jarno Suni]

I have enabled volume management in preferences and I have enabled "Mount removable drives when hot-plugged" and "Mount removable media when inserted" and "Browse removable media when inserted" in its configuration, but when I connect my USB hard disk, it won't mount automatically.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: thunar 1.6.3-1ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Mon Dec 16 13:22:31 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-09-20 (87 days ago)
InstallationMedia: Lubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
MarkForUpload: True
SourcePackage: thunar
UpgradeStatus: Upgraded to saucy on 2013-10-18 (58 days ago)

[Jarno Suni (jarnos)]

Thunar's auto-mount works if and only if I have enabled it in pcmanfm's preferences!

[Jarno Suni (jarnos)]

..provided that pcmanfm is running. When it works, it has nothing to do with Thunar.