I get all this warnings in latest version for Ubuntu 14.10:
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/recommendations.py:246: PyGTKDeprecationWarning: Using positional arguments with the GObject constructor has been deprecated. Please specify keyword(s) for "label" or use a class specific constructor. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
self.opt_in_button = Gtk.Button(_(self.TURN_ON_RECOMMENDATIONS_TEXT))
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/recommendations.py:248: PyGTKDeprecationWarning: Using positional arguments with the GObject constructor has been deprecated. Please specify keyword(s) for "homogeneous" or use a class specific constructor. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
hbox = Gtk.Box(Gtk.Orientation.HORIZONTAL)
/usr/bin/software-center:184: Warning: Source ID 151 was not found when attempting to remove it
Gtk.main()
2014-06-27 01:45:46,928 - softwarecenter.db.utils - INFO - software-center-agent finished with status 0
/usr/share/software-center/softwarecenter/backend/installbackend_impl/aptd.py:764: Warning: Source ID 3782 was not found when attempting to remove it
GLib.source_remove(self._progress_signal)
/usr/bin/software-center:184: Warning: value "101,000000" of type 'gdouble' is invalid or out of range for property 'value' of type 'gint'
Gtk.main()
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/exhibits.py:404: Warning: Source ID 513 was not found when attempting to remove it
GLib.source_remove(self._timeout)
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/exhibits.py:404: Warning: Source ID 1168 was not found when attempting to remove it
GLib.source_remove(self._timeout)
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: software-center 13.10-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.15.0-6.11-generic 3.15.0
Uname: Linux 3.15.0-6-generic x86_64
ApportVersion: 2.14.3-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jun 27 01:47:04 2014
InstallationDate: Installed on 2014-05-08 (49 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: software-center
UpgradeStatus: No upgrade log present (probably fresh install)