We have a multithreaded application using MFC 7.1SP1. It has recently displayed very curious behaviour. When a new IE6 window is opened or the browser navigates to a page with a pop-under, the application spontaneously crashes with an access violation within MFC’s message handing code. If this has any bearing on matters, our application is a COM server for scripting; the crashes can happen even when it is not called from a script.

Regards,
Andrew