I made the switch to KDE3.  So far, I haven't had any problems.  2.2.2 felt
sluggish on my machine sometimes, but kde3 is fast in every respect.  Text
looks much better.  And konqueror works with sites that had "issues" before
(epinions.com, paytrust.com, etc.).  Konqueror is *way* faster too.

If you haven't made the switch yet, I suggest doing so.  I'm running the
latest CVS version, not RC3, but I guess RC3 is just as good.  I'm running
Gentoo, so I followed the instructions at
http://www.gentoo.org/~danarmak/kde3-pre.html.  

Jay