InvalidCallException from Microsoft.DirectX.Direct3D.Device.Clear

I ran into a puzzling bug and wanted to see if  anyone else has run into a similar problem.

I'm using the October SDK.  On most machines, the exception never gets thrown.  On a few select machines however, I will get an unhandled exception of type "Microsoft.DirectX.Direct3D.InvalidCallException".  Looking this up in the docs, it mentions that if the ZBuffer or stencil buffer flags are passed in and the zbuffer or stencil buffer doesn't exist, you will get this exception.  However, I'm not passing in either of those flags because I didn't create a stencil buffer.

The strange part is that it only happens on a select few machines that have the same setup as the rest of the machines (same video card, same drivers, oct SDK, etc.).  I've also tried allocating a stencil buffer (even though it's not needed in our program), but received the same crash.

Has anyone come across something like this or know what the solution is   Thanks.