handsome_tony - 7:00 am on May 18, 2012 (gmt 0)

I solved the problem!

It turned out my favicon.ico was actually a png file (even though I renamed it, it needed to be converted from png to ico). I did so, then re-uploaded it to my site at almost every level (server, blog root, theme, images folder, etc.). I also included a higher resolution image for Safari. Now it shows in EVERY browser! I only had to use the code below in my header file:

<link rel="icon" href="favicon.ico" type="image/x-icon">
<link rel="icon" href="http://example.com/favicon.ico" type="image/x-icon" />

Thanks for the replies here, much appreciated.

I am glad to be a part of this forum!