picard crashes system or becomes unresponsive

[morryis]

After starting picard on a fresh oneiric installation the application window shows up for a second, then ubuntu falls back to login screen. I tried to start picard via terminal several times. One time it didn't crash the whole system but picard became unresponsive without showing the window i.e. the application windows appeared to be 'empty' like all interface elements could not be drawn.

terminal output:
(python:4999): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed

(python:4999): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed
QWidget::setMinimumSize: (/MainWindow) The largest allowed size is (16777215,16777215)

see also output in stderr.txt

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: picard 0.15-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
Architecture: amd64
Date: Wed Sep 7 19:58:07 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110907)
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: picard
UpgradeStatus: No upgrade log present (probably fresh install)

[Scott Kitterman (kitterman)]

Qt 4.7.4 was uploaded to Oneiric today. If someone who's experiencing this problem and running Oneiric could try again with the new Qt, that would be a big help.

[Christian Kampka (kampka)]

After upgrading the system, including libqt4*, the problem still exists.

[theghost (theghost)]

It also affects a nuber of other qt programs due to an issue wit qt4-x11: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805303

[theghost (theghost)]

The error: "(python:4999): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed" is a known issue of the qt4-x11 package.