In Safari prefs, privacy settings tab, I have "Block cookies from third parties and advertisers" checked. However, I see that I still accumulate cookies from sites I haven't visited such as twitter.com, msn.com, doubleclick.net, wsj.net, etc. It appears that there are links on pages I visit that propagate these cookies. Hundreds of cookies were received after I loaded a page with several tabs open and very little other activity by me. I'm using Safari 5.1. Is there a way to block cookies except for sites I visit? Note: I Googled this problem and found that it is a VERY common complaint for many users. I'm hoping someone here has a work around.