According to the Yahoo! Search Blog they are in the process of updating their crawling, indexing and ranking algorithms.
This is the first update for Yahoo! in 2008. Hopefully we will not see to much of a detrimental impact. In fact, we’ve often seen improvements across our clients during Yahoo!’s updates.
As usual we urge clients not to panic if they drop in Yahoo! as these updates usually work themselves out over several weeks regardless.
If you have questions about this – please email us, OK!