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
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=ba3e997daea 267b100988ecd7c 6d0767c334dfbc