The same bug. This stuff occured with file that seemed to be encoded with Div3 ...-motion (I don't remember which one exactly) but wmp6.4 did play it well with DivX6.0 decoding. As a result of changing of codec's ID value to mp43 (it was DIV3) BSPlayer played it using asfdecoder (as it seems to me) instead of DivX6.0 and didn't crash :)
But this movie was the only one that caused BSP's crash after DivX6.0's installation.