I'll never figure out the mysterious behavior of the Preview Pane here on FR. Even with the fine spell check feature (which, of course, won't catch the "its/it's" misuse), I have a tendency to not see mistakes until after the Post button is pressed and my botches are then published to the whole wide, wide, wide world of sports and webocracy. Strange that. :-)
As for the problem with FR sluggishness, I presume that you're using Windows and possibly Internet Explorer. As a Linux geek, my knowledge of Microsoft products is close to nil (or more apt, NULL, as in the pointer of that name). In the immortal words of Brian Kernighan and the late Dennis Ritchie: check with a local expert.
As for FR's spell check option, well...
If you can't appreciate the pure beauty of the violin after hearing this, something's wrong with your ears.
Or you can get raw with these strings.
How about this gamechanger from America's Got Talent (which they SHOULD have won).
And finally, this, dedicated to the one and only rdb2, whose eyes are growing dim.
Either way, the violin is sweet yet LETHAL.
Do it!