Gnome-shell freezes up completely when doing backup and restore.

[KML]

Gnome-shell freezes up completely. Only mouse-pointer reacts, but as everything is frozen, so you can't click anything.
This is provoked every time i try to back up or restore with the Backup utility in Gnome-shell over WebDavs (https).
It is still running while it freezes (music is still playing, and backup/restore is still running) and then it comes out of the freeze when the backup/restore is done. This is just not only happening when using the Backup utility. While it was uploading this bug report (took about 2 minutes) it was also freezing during the entire upload.
I have had this problem in 13.10 64-bit, in 14.04-alpha 64-bit, and now in 14.04-alpha 32-bit, so the problem isn't new, it is just the first time it noticed that something was wrong, and gave me the opputunity to send a report.
If you need logs or dumps i will provide them for you.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: tracker-extract 0.16.2-1ubuntu3
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
CrashCounter: 1
CurrentDesktop: GNOME
Date: Sat Mar 8 01:27:37 2014
ExecutablePath: /usr/lib/tracker/tracker-extract
InstallationDate: Installed on 2014-03-01 (6 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha i386 (20140228)
ProcCmdline: /usr/lib/tracker/tracker-extract
ProcEnviron:
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
Signal: 5
SourcePackage: tracker
StacktraceTop:
 g_malloc () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_slice_alloc () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0
 gst_allocator_alloc () from /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0
 gst_buffer_new_allocate () from /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0
Title: tracker-extract crashed with signal 5 in g_malloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_malloc (n_bytes=n_bytes@entry=1382491) at /build/buildd/glib2.0-2.39.91/./glib/gmem.c:102
 g_slice_alloc (mem_size=mem_size@entry=1382491) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:1007
 _sysmem_new_block (flags=(unknown: 0), maxsize=1382415, align=15, offset=0, size=1382400) at gstallocator.c:415
 gst_allocator_alloc (allocator=<optimized out>, allocator@entry=0x0, size=size@entry=1382400, params=<optimized out>, params@entry=0xa8f512d8) at gstallocator.c:312
 gst_buffer_new_allocate (allocator=0x0, size=1382400, params=params@entry=0xa8f512d8) at gstbuffer.c:668

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.