Ive just checked my site on Google webmaster tools, and I have noticed that there are 20+ 404 pages, these pages have this sort of code extention below, can anyone tell me what it is - obviously there are no pages... mydomain.com/&usg=ALkJrhgA6gG7gkmf0JGRaPJhWHy3YeMKng Will the not found pages effect my PR? How can I rectify this? I deleted a blog and 6 pages refer to this blog. Now I have re -installed Wordpress and started to blog again, so that should sort itself out.
i think if your website is maintaining sessions then that might be session id..but i am not sure about that
If you have deleted the pages with broken links or have edited them, the errors will soon go from google webmaster tools console. Don't bother about PR all that much