CRITICAL **: Could not marshal argument 0 for SetLocation

Ubuntu:14.10 Utopic
Empathy: 3.8.6-0ubuntu11

Just got an error message that suggests that "this is normally a bug":

** (empathy:6189): CRITICAL **: Unable to marshal string (not UTF-8 or OOM?): "p\375\001\003"

** (empathy:6189): CRITICAL **: Could not marshal argument 0 for SetLocation: type GHashTable_gchararray+GValue_, value ((GHashTable_gchararray+GValue_*) 0xab4760)
process 6189: arguments to dbus_message_iter_append_basic() were incorrect, assertion "_dbus_check_is_valid_utf8 (*string_p)" failed in file ../../dbus/dbus-message.c line 2598.
This is normally a bug in some application using the D-Bus library.

** (empathy:6189): CRITICAL **: Unable to marshal string (not UTF-8 or OOM?): "p\375\001\003"

** (empathy:6189): CRITICAL **: Could not marshal argument 0 for SetLocation: type GHashTable_gchararray+GValue_, value ((GHashTable_gchararray+GValue_*) 0xab4760)

I noticed around that time(though it could be unrelated) empathy got disconnected from my facebok account.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: empathy 3.8.6-0ubuntu11
ProcVersionSignature: Ubuntu 3.16.0-4.9-generic 3.16.0-rc5
Uname: Linux 3.16.0-4-generic x86_64
ApportVersion: 2.14.4-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Jul 20 14:20:09 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-09 (10 days ago)
InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140708)
SourcePackage: empathy
UpgradeStatus: No upgrade log present (probably fresh install)