We are having "hard assert" problem with IE8 and Jquery UI dialog modal form. Modal form pops-up when clicking "Create PDF"-button. Our modal form has only textarea where the user can write some additional text to be printed to the PDF. If user clicks "Create PDF" in modal form the modal form closes fine and the PDF is created. If user clicks "Cancel" in modal form we get "hard assert" problem meaning that IE8 shows flyout balloon notification that says "Internet Explorer encountered a problem with *website* and has loaded it in compatibility mode". We have this samekind of situation in another page also, but after clicking "Cancel" IE8 invokes complete page blankness. This problem concerns only IE8. IE9 and FF works just fine and we don't support other browsers nor earlier versions of IE.
I've read that the problem might occur with certain CSS property combinations like float, max-height and overflow value of scroll, but I'm not sure does the Jquery UI modal dialog form use these property combinations. Would you have any suggestions where to look for the solution or have you heard about any similar kind of problem before with Jquery ui widgets?