If overdue tasks are not displaying in red, the root of the problem is that the ComponentArt.css file on the server is not the current one. If CSS files are updated with previous CSS files after an install, you must make sure the following CSS is in the ComponentArt.css:

.RedRow

{

  background-color: #FFA0A0;

}

.RedRowtd.DataCell

{

  padding: 3px;

  padding-top: 2px;

  padding-bottom: 1px;

  border-bottom: 1px solid #EAE9E1;

}