Extrude Region (Vertex Normals) stopped working properly in one file i used to be able to create bulky pieces like these


by applying extrusion along normals on the loop of faces like that:




at some point in started working like the regular Extrude Region, giving results like these: 


also, as you can see, creating new object in the same scene does not help, only creating new file does.

link to the file: http://www.pasteall.org/blend/43119

i would like to know how to restore the usual functionality and what i might have done to cause this.
Extrude region with vertex normals behaves nearly like extrude region if the pivot point is set to individual origins.

Set the pivot point back to median point to have the expected behavior :