Blender Inset and Chamfer

Am using Blender 2.62 and inset is a mess in it.

Has anyone else also checked and seen the issue?

Also any idea how to do chamfer? Or this feature would come in Blender 2.63 with BMesh?

Use inset-extrude or inset-polygon addon

There are 5 files but except for the first one, none are getting downloaded.