1. Geometry that have applied crease not mirrors correctly.

In both examples geometry on the left is original.
Second example shows simple box that have three edges creased and as you can see mirrored version differs radically.

2. There are problems with deleting and working with free floating points.
When I try to delete them I get message that is attached. For more info check this topic http://forums.odforce.net/index.php?/topic/11190-couple-unsolved-mysteries/ [forums.odforce.net].

Anybody ? It's only me or other also had/have those problems ?

Crease case is submitted as a bug, case file ID# 40207.

As for points it's also a known bug an is on the fix list.

If you mirror with the option Reverse Normals -> No you get what you want except with the primitive normals inside the box on the mirrored copy. Weird.

BTW, wouldn't it be nice to have a Create output group in the mirror SOP just like in the copy SOP? In case Houdini has more of this weird behavior it would be much easier to fix…

Cheers,
Hans