Windows 7 Professional 54-bit w SP1
GeForce GTX 760 - driver 361.43
Blender 2.76 (sub 8), branch: master, commit date: 2016-01-22 02:31, hash: 017c45b,
type: Release build date: Fri 01/22/2016, 05:01 AM
note: problems can be reproduced on any version of Blender back as far as 2.75a
Short description of error
Inset Polygon function is not working correctly in the following ways:
A) When generating inset polygons, the edges from the original faces are not deleted. The operator is forced to select each one by hand for deletion. This problem occurs in all but the simplest of meshes. The problem occurs with either of the attached blend files ( poly_inset_problem1.blend, poly_inset_problem2.blend ).
B) When generating inset polygons on selected faces from a more complex mesh ( blend, poly_inset_problem2.blend ) the add-on generates nested groupings of inset polygons rather than one, discrete group of inset polygons when the distance of the inset polygons is increased. This behaviour can not be controled by the operator.
C) As a last observation, when the inset polygon function has finished the operator is left with an empty selection. It would seem more correct for the newly-created group of inset polygons to be selected by default.