使用CSS在IE中显示已隐藏的表格单元格

IE 7 does not display the initially hidden table cells (class="c") when class of the containing div is changed to "b", where "display:none" rule is removed. However, it should as it does for the row (class="r"). Other browsers behave properly. Seems like an IE bug. Did anyone came across this issue before? Any solutions?IE 7 does not display the initially hidden tabl