unless they had images turned off in their browser (and there's nothing I can do about that one).

Actually, you could do at least something about it: Include an "ALT" option inside the <IMG> HTML-Tag. Currently, the IMG tag looks like this:
<IMG SRC="/images/read_the_faq.gif">
But it probably should look like this:
<IMG SRC="/images/read_the_faq.gif" ALT="Read the FAQ!!!">

cu,
sven