correction:
2) reproduced with Inkscape 0.46+devel r22598 on OS X 10.5.8, after deleting preferences.xml, using 'Ctrl+z' to 'undo'
correction:
2) reproduced with Inkscape 0.46+devel r22598 on OS X 10.5.8, after deleting preferences.xml, using 'Ctrl+z' to 'undo'