Netscape Navigator 4.6 and ASP.NET
If your life sucks so badly that you have to support Netscape 4.x, you might want to remember that Netscape 4 never handled Unicode/UTF-8 very well. Since UTF-8 is ASP.NET's default Response Encoding, you'll often see the Evil Black Squares "" ©2003 displayed instead of your text.
Easily fixed though, change the following line in the Web.config file from
<globalization requestEncoding="utf-8" responseEncoding="utf-8" />
<globalization requestEncoding="utf-8" responseEncoding="ascii" />