After installing the Symbola 7.02 font from this page
, I had no issues seeing all the characters in the latest version of Firefox. Still couldn't see them in Chrome, IE8, or Opera though. (WinXP)This page
seems to indicate it might be an issue in Chrome that goes back at least 3 years.
And my guess is the chars are just not supported in IE8 and probably never will be.
So, if you want to see the chars, your best bet is probably to use Firefox.