These models caused outline generation problems when sliced at 0.002 layer height. They are manifold but have vertices that are exactly incident to slices at 0.002 layer height.  They are handled by bumping these vertices up by a small amount so that no vertices are incident to a layer.
Manifold model with faces that overlap and extend from exterior to interior.
This model has non-manifold vertices and possibly overlapping facets, similar to Ballista.
Merge branch 'master' of github.com:makerbot/TestFiles