YSlow gives me the "There are 94 components with misconfigured ETags" -message. I have configured them with
When YSlow complains that your ETags are "misconfigured", it really means that ETags are present. If you read through the Yahoo Performance Rules regarding ETags, you'll see their basis for recommending that they be turned off.
You could test this by running YSlow on your site after turning off ETags with this setting in your .htaccess file:
In general I wouldn't worry too much about trying to keep ETags turned off. Yahoo's advice is more geared towards a multi-server site, so the rule doesn't necessarily apply in all cases.