Yahoo count both links dofollow & nofollow links. I think you suffer the lpc problem may be one reason is top commentator & site wide links from blog. If you are add link in blog and it have top commentator widget then you must maintain whole month that blog. For example I add a comment in one post at 1st day of month & I got link on 350 pages of that blog by top commentator. If I don't maintain this blog then my site's lpc will automatically down when yahoo bot cache that site next crawling.
I have a website and i did the link: command in Google only to find i had no-one linking to me. Then i went to the Yahoo site explorer and it returned 890 back links. What does this mean? Surely if i have 890 back links then Google would show me this information too? Where can i check the correct number of back links i have in total? thanks
Search engine such as Google use a special link analysis system to rank web pages. Most search engine use this data to calculate how popular your website is. The more link to you the better your search engine ranking will be.