1. When a tooltip displays both hebrew and english characters - the characters appear in reversed order.
FlyGrid.Net is uses standart tooltip window to display tooltips, unfortunately current version doesn't allow to output mixed text (due the CommonControls library limitations), the next major version of FlyGrid will allow custom drawing in tooltips and will not depend on CommonControls limitations.
2. The header row doesn't display a tooltip even though the whole column was assigned a tooltip.
Please describe problem more detailly - do you mean row headers or column headers?