Posting this for Mitch, who got an error from SourceForge when he tried to create the tracker item.
The problem:
A sprite object with a distort mesh applied to it will disappear and reappear as the center of the object approaches the edge of the screen.
How to recreate:
Download and unpack the attached "3dscroll.rar" file and run the enclosed .cap. Scroll the view back and forth using the WASD keys. The sprite objects with the mesh applied will pop in and out of view unexpectedly.
Texture pop bug example
Set group to "Bug report." Oops :P