If you place the table control in a <form>, it does not display at all in IE6 (not tried in other browsers yet) .
It happens just because one form already exists in the table. Nested forms don't work in IE6. The form inside the table is needed to impement filtering controls. So if you switch filtering off that form will not be inserted into table HTML code.
Is this in IE6 alone? Thanks.
No, this is true for all IE.