>>I agree with you Hector. IE is very forgiven on strange tags. It will not render any tag as text, reguardless of what it is. I tested the URL on Opera, FireFox, and Netscape 7.1, and the line show on all of them. They are more strick about HTML tags and formatting.
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>Thanks a lot for testing, Greg. Hector's explanation sounds very reasonable. Mona (the parent) told me, she is using some package from Adobe (or I understood her this way) for designing WEB Pages. For uploading files to the server she uses another software, which I never heard of: "Coffee Cafe" (???) if I remembered it right.
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>So, what should be done to make it work correctly in any browser? I guess, these files should be just simple HTML files, not ASP.NET files because the information seems to be pretty static and I do not think, that some database is involved.

My only suggestion would be to delete the line out of the HTML file. If the page does not require the line, there is no need for it. That is if it is a static HTML page.