With 12.04.02 it is still not working.
Even if I have this:
$ cat ~/.config/gtk-2.0/gtkfilechooser.ini
[Filechooser Settings] LocationMode=filename-entry ShowHidden=true ExpandFolders=true ShowSizeColumn=true GeometryX=0 GeometryY=0 GeometryWidth=1481 GeometryHeight=663 SortColumn=size SortOrder=ascending
the open/save dialog always sort by size.
With 12.04.02 it is still not working.
Even if I have this:
$ cat ~/.config/ gtk-2.0/ gtkfilechooser. ini
[Filechooser Settings] filename- entry
LocationMode=
ShowHidden=true
ExpandFolders=true
ShowSizeColumn=true
GeometryX=0
GeometryY=0
GeometryWidth=1481
GeometryHeight=663
SortColumn=size
SortOrder=ascending
the open/save dialog always sort by size.