Why can't I see my backlink anymore??

I got a few high PR backlinks the other day and as of a few days ago i could still see them in yahoo backlinks but now they are gone. I checked the pages and my links are still there, but it does not show up anywhere now it seems. Why would this happen?

 

They might be updating the links. I am sure yahoo will list them they like showing all links.

 

Ya i dunno, i noticed a few of my good backlinks just disappeared from yahoo links although they are still live links. Weird....this ever happen to anyone else?