http://bugs.winehq.org/show_bug.cgi?id=22768
--- Comment #4 from Michael tiemichael@gmail.com 2010-05-19 20:44:29 --- (In reply to comment #3) Thank you! I installed everything (w/o IE7) again into a new wineprefix, and all is fine!
Re-install to a clean wineprefix, without any of that other stuff installed. It's fine to set the override for riched20.