kio-tmp causes dolphin slowness

$ lsb_release -rd
Description: Ubuntu 13.04
Release: 13.04

$ apt-cache policy kio-mtp
kio-mtp:
  Installed: 0+git20130315-0ubuntu1
  Candidate: 0+git20130315-0ubuntu1
  Version table:
 *** 0+git20130315-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ raring/universe amd64 Packages
        100 /var/lib/dpkg/status

What I expected to happen:
I expect dolphin to open quickly and right-click menu to open instantly.

What happens instead:
Dolphin takes several seconds to start and right-click menu takes a further few seconds to open.

Using apt-get to remove kio-mtp results in dolphin opening instantly and right-click menu opening instantly.
Re-installing the kio-mtp package brings back the slow start and right-click menu.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: kio-mtp 0+git20130315-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Tue May 7 21:30:31 2013
InstallationDate: Installed on 2013-05-01 (5 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: kio-mtp
UpgradeStatus: No upgrade log present (probably fresh install)