Yeah, I remember that it used to, but they seem to have removed it (at least for the themes that I looked at). There also used to be a background gradient which I haven't seen in awhile (which is fine since it tended to be rather dark and made dark text somewhat less easy to read).
[Edit:] Ahhh, wait... I think I know what happened (without bothering to actually check)--the site's style sheet still has -moz- on the box-shadow
and the newer versions of Firefox ignore the old syntax. Meh. [Edit#2: they use the old image gradient method]
[Edit#3: for those using a newer release of Firefox and aren't seeing a box shadow now and want to...] The site's box shadow varies with the theme you're using, but if you're using a light theme then it would either be the following or something close to it:
box-shadow: 5px 5px 5px rgba(0,0,0,0.6) !important;
(which you can add somewhere in the .nicetitle ruleset)--
"...but ya doesn't hasta call me Johnson!"