Disappearing meshes

I found a thread that may have some answers - so I am just storing it here (in this thread):

http://www.blitzbasic.co.nz/Community/posts.php?topic=40479

But this is not the thread - I am just putting it here (and anthing else I dig up)

Found another:

http://www.blitzbasic.com/Community/posts.php?topic=35594