Running Recorder on an AUT Winform with an embedded IE browser control.

Locator Spy throws error 'Unable to get properties for the specified object. Object 'foo' could not be found because it was either destroyed or the application has an inconsistent automation hierarchy.

'foo' does exist as Locator Spy highlights it correctly on the AUT with a bold green border. Hit Ctrl-Alt and the above error is thrown.

I'm tempted to think it's a bug, but equally it could be that the DOM hierarchy is in fact stuffed in some way. Has anyone else either encountered this error, or suggest how I can verify the hierarchy?