Hi Michael,

>Does this happen only if you are generating a shaded background image?

It's inconsistent. If turned off, solids will sometimes stop throwing the error but the result is still flipped vertically.
Turn it back on and it continues to NOT throw the error. Orbit the camera, still okay. Orbit the camera some
more and eventually it starts throwing the error again. It's weird, it's almost like the buffer data gets corrupted
at least in regard to Photoshop. And once that happens it keeps throwing the error and doesn't care whether
the background image is on or off.

The previously attached .3dm is curves only and should always paste, albeit flipped, but sometimes curves only
will also throw the error if selected curves match the edges of unselected surfaces.

-Jeff