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.