I checked the Opera web site and found that the browser's e-mail features are much expanded from the earlier version I had on Sluggo. I also found that Opera now supports (though not for Macs yet) the GNU Aspell spell checker! All you need to do is download and install the free Aspell program (1.2MB) and any (or all) of the dictionaries (available for 22 languages- the English dictionary is 2.4MB) and Opera will let you use them to spell check any text you write on any web page, as well as in Opera mail. I do like Firefox (especially the AdBlock extension), but I'm more and more impressed with all the spiffy features being added to Opera as it continues to develop, as well as its clean interface and ease of use. I'll probably keep it as my default browser, and only use Firefox for ad-laden sites and a few other special uses. I'm very well pleased with Opera right now.