Yahoo indexing just stopped

Indexing 20 pages a day then nothing ...

[internetheaven]

Having a little query with Yahoo. I put a new site on the web, linked to it from one of my other sites which has good standing in Yahoo and Yahoobot picked it up and starting indexing about 20 pages a day.
Every day I'd come back and another bunch of pages would be showing when asking for all pages on my site.

Then, all of a sudden, Yahoo just stopped indexing pages. It stopped at around 450 pages and it hasn't moved for over six weeks now. I haven't changed anything scripting/server/format-wise so I have no clue why the great interest followed by the sudden stop.

Any clues? Did Yahoo change any major indexing rules recently that anyone knows of?