ModalPopup control conflict with page scroll--URGENT!

Are you talking about the extra scroll you get when the modal panel is up?

If so, try adding the following function to your page:

function ShowScrollbars(show)
{
document.getElementsByTagName('html')[0].style.overflow= show=='true'?'auto':'hidden';
}

And call it in the OnOkScript and OnCancelScript of your extender like so:

On...Script="ShowScrollbars('true')"

And in your OnClick of the control that pops the modal panel:

onClick="ShowScrollbars('false')"

This will turn the scrollbars off while the modal window is displayed.