Summary: When the background property of a col element is changed, the column's cells do not repaint.
To reproduce: open the testcase in Safari and click the link, then select and deselect all text.
Expected: background color to change from yellow to green immediately when clicking the link.
Actual: background was repainted green only when repaint was triggered by text selection.
Created attachment 4792 [details]
The latest patch for bug 11720 (attachment 12868 [details]) fixes this bug.
Fixed with fix for bug 11720 in r19490.