Greetings:
A website visitor recently wrote to report that units of mm were appearing on the skin depth page when it should be um.
Great, just what I needed, something else to take up what little time I have.
That prompted me do some research. It turns ou that he was using Forefox 3.0x, and that Mozilla changed its method of displaying (or not displaying) glyph type characters, of which Symbol is one. That has caused a huge rift in the online world because of how prevalent Symbol fonts are on major math and science websites. Mozilla makes no apologies.
I found work-arounds that involved users editing configuration files for Firefox, and other types of voodoo machinations, but I certainly will not require that of my visitors in order to properly render a page. Therefore, as part of my overall web page modernization effort, I will replace all the existing Symbol font characters with something compatible with all browsers.
Oh well, 5-6 hours sleep per night was too much anyway

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- Kirt Blattenberger
RF Cafe Progenitor & Webmaster