The issue looks something like this:
If you click and drag your mouse, you will see that the words *are* there (the header titles), but they are not using the correct CSS.
This is because in Joomla 1.5, the columns are sortable by clicking on, say, date. This makes them all links.
Many template designer use something like:
td.sectiontableheader {
font-weight: bold;
background: #8D9055;
color: #ffffff;
}
But now this wont work, you need to apply the style to a link, like so:
td.sectiontableheader a {
font-weight: bold;
background: #8D9055;
color: #ffffff;
}
Make this simple edit, and all should be as expected!
Now you can take advantage of those great new sortable columns!