Yahoo shows last indexed date of 1970/01/01

I did a thorough search and couldn't really find anything specific related to this topic. A few of the pages are coming back as last indexed 1970/01/01 in the yahoo site explorer. They've been that way for a few weeks while others are updated.

The pages do appear in the SERPs, but I am wondering if this is something to be concerned with? A valid sitemap is posted and the site is authenticated with yahoo.

Thanks

 

Wow! If that were the case with Google, your pagerank might be way up there. Talk about a trusted source!

 

Come to think of it you're right! It seems that it's happened to others starting around November when they must have changed something.

 

how do i get my site to look that old?

 

Beats me as ours is now reflecting the correct date. I think it was just a temporary hicuup, the bot hit the site over the last few days and it's now reflecting the correct dates.

 

I already asked Yahoo! reps (at the sitesearch feedback area) and they said when a page does not exist anymore in their database and all they have for it is the URL, then it shows the date like that (1970/1/1).

 

it's incredible hehehe