(inkscape:1815): Gtk-CRITICAL **: gtk_misc_set_alignment: assertion `GTK_IS_MISC (misc)' failed on Start

This is an upstream bug in Gnome/GTK+:
616851 - Gtk-CRITICAL **: gtk_misc_set_alignment: assertion `GTK_IS_MISC (misc)' failed
<https://bugzilla.gnome.org/show_bug.cgi?id=616851>

fixed in GTK+ 2.21.0 (latest unstable release)
<http://mail.gnome.org/archives/gtk-list/2010-May/msg00024.html>

fixed in GTK+ 2.20.1 too (bug fix release in the 2.20 series - Sun, 02 May 2010)
<http://mail.gnome.org/archives/gtk-list/2010-May/msg00000.html>

The GTK+ bug apparently is *not* fixed in GTK+ 2.20.1 - after upgrading to gtk2 @2.20.1_0+x11 (MacPorts) I see the same error messages (Inkscape 0.47+devel r9424 on OS X 10.5.8).

Rebuilding gtk2 2.20.1 with the patch [1] mentioned in comment #11 <https://bugzilla.gnome.org/show_bug.cgi?id=616851#c11> fixes the bug causing these console messages in Inkscape.

[1] http://git.gnome.org/browse/gtk+/patch/?id=ba3e997daea267b100988ecd7c6d0767c334dfbc

debdiff without the translation, autotools, etc noise

[osx packaging] Ticket filed in MacPorts for including the patch in gtk2 @2.20.1:
<http://trac.macports.org/ticket/24948>

Accepted into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Been using the proposed package for a few days now and did not noticed any regression so far, Also i can also confirm that it does fixes the issue of the Gtk-Critical message. Marking this as verification done, thanks all.

maverick has a newer version

This bug was fixed in the package gtk+2.0 - 2.20.1-0ubuntu1

---------------
gtk+2.0 (2.20.1-0ubuntu1) lucid-proposed; urgency=low

  * New upstream version:
    - Support Tracker 0.8 in the filechooser search
    - Bug fixes:
    615028 gdk/x11/gdkdnd-x11.c missing Xutil.h
    614099 GtkFileSystemModel may causes crash in g_file_get_child
    615999 Gail doesn't send state-changed events for ATK_STATE_ENABLED
    614894 Add heuristic for pre XRandR 1.3 drivers
    613988 Compile error on DirectFB backend due to missing...
    560147 GtkBuilder docs should say what GErrors they throw
    615128 gdk monitor order does not seem to be correct
    614971 Initialize search engines on demand
    613887 Misprint in the description of gtk_cell_view_new_with_text
    615853 BadMatch when pressing keyboard volume keys...
    615000 gtk_builder_value_from_string_type() returns FALSE without...
    614540 configure wants gio-unix on all platform
    613974 GtkToolItemGroup devides by 0 when allocating space...
    557689 In 'select folder' action, filechooser doesn't work when...
    616851 gtk_misc_set_alignment: assertion `GTK_IS_MISC (misc)' failed
    402349 FileChooser's default directory is not "active"
    64bit issue with the ICC profile support in the PNG loader
    Missing break statement in gtk_tool_item_group_set_property
    Missing default events in gtk_tool_item_group_realize
    - Updated translations
  * debian/patches/003_gdk.pc_privates.patch:
    - updated for the new version
  * debian/patches/064_initial_fileselector_select.patch,
    debian/patches/090_directfb-map-virtual-modifiers.patch:
    - the change is in the new version
  * debian/patches/070_mandatory-relibtoolize.patch:
    - new version update
  * debian/patches/092_git_change_no_gtkmisc_warning.patch:
    - git change to really fix the gtkmisc warnings issue (lp: #576852)
 -- Sebastien Bacher <email address hidden> Tue, 18 May 2010 14:18:59 +0200

It turns out that this bug was really fixed upstream in gtk+2.0 version 2.21.5 (see upstream changelog!).

The fix made it into Ubuntu:

gtk+2.0 (2.21.5-1ubuntu1) maverick; urgency=low

  * Merge with Debian experimental, Ubuntu changes:
  * debian/control.in:
    - Add introspection build-depends
    - Add Vcs-Bzr link
    - Add gir1.0-gtk-2.0 package
    - libgtk2.0-dev replaces gir-repository-dev
    - Conflict with appmenu-gtk (<< 0.1.3) to prevent menu proxy breakage
  * debian/rules:
    - Build with --enable-introspection
    - Add gir1.0-gtk-2.0 package to BINARY_ARCH_PKGS
    - Add dh_girepository call
    - Disable devhelp files
  * debian/dh_gtkmodules.in:
    - Remove obsolete script content
  * debian/libgtk2.0-0.symbols:
    - Add Ubuntu specific symbols
  * debian/libgtk2.0-dev.install.in:
    - Add gir files
  * debian/libgtk2.0-doc.install.in
    - Disable devhelp files
  * debian/gir1.0-gtk-2.0.install.in
    - Introspection package
  * debian/patches/043_menu_proxy.patch
    - Add GtkMenuProxy support for remoting menus.
  * debian/patches/062_dnd_menubar.patch:
    - Allow click on menubars for dnd
  * debian/patches/063_treeview_almost_fixed.patch:
    - Add an ubuntu-almost-fixed-height-mode property, (required for
      software-center)
  * debian/patches/071_no_offscreen_widgets_grabbing.patch:
    - Don't let offscreen widgets do grabbing
  * debian/patches/072_indicator_menu_update.patch:
    - change by Cody Russell to send an update event on menu changes,
      should make the bluetooth indicator refresh correctly
  * debian/patches/091_bugzilla_tooltip_refresh.patch:
    - Upstream bugzilla change to have better looking tooltips the gtk theme
      need to set "new-tooltip-style" to use those
  * debian/watch:
    - Watch for unstable versions
 -- Robert Ancell <email address hidden> Thu, 22 Jul 2010 21:41:30 +0200