If they only concern the index.php, then they must have been spidered before you implemented the guest session mod to get rid of SIDs.
Make sure you have :
- Code: Select all
In your robots.txt file, that's the main interest of this rule. Now I have observed that Yahoo keeps old URLs in it's listing for quite a while, but they should not remain in cache too long once they are disallowed with the robots.txt.
Then, Google and MSN should get rid of those faster is they ever had them in cache.