I'm using AutoCAD 2008 with Microvellum and I've noticed some strange behavior which did not apprear before we installed Microvellum. I'm having an issue with mirroring blocks and then exploding them. Typically my blocks consist of mainly closed polylines, when I copy the blocks and explode the copied blocks my closed polylines remain intact, but if I MIRROR my block and explode it my polylines are broken down into lines. Can anyone explain why this is happening? I know that Microvellum loads a lisp file maybe something in there is the cause of my problem.

Thanks