Thanks to Greg & all those that responded. It appears that IE works fine and that the problem is isolated to Netscape in certain configurations.

Using Netscape 4.7 for Mac (on a Mac, obviously) I have the problem of certain Titles disappearing (blank) when viewing with Java & Javascript turned on.

When I turn off Java & Javascript and reload the page, all the information appears, though in a slightly different format. Some of the titles are long enough that they wrap to a 2nd line. The disappearing titles seem to be just long enough to touch the right edge of the cell without being long enough to wrap to a 2nd line. I think this very isolated glitch is causing the problem, when the Excel file is converted to html.

Anyway -- bottom line -- if you're one of the very few with this problem, try turning off Java & Javascript, then reload the page. It worked for me.