Same keyword gets different Yahoo! rankings on different computers?

Even with both people logged out

[edvisors]

As of about July 30, a co-worker (and search submit express) is reporting different rankings for some Yahoo! searches. We're both logged out of our Yahoo! accounts. I've never seen this before - any thoughts?

[martinibuster]

You mean different rankings across different computers?

[blend27]

I see almost the same situation, from 2 different computers via the same IP accessing internet.

4 word phrase

But my is a bit more interesting:

My site has top 3 listings

4. then goes my competitor(root of the site and title from yahoo directoty)
5. then another page from the same competitor
6. then a page from nextag
7. then goes same competitor(root of the site without www and normal title)
8. then a page from nextag
9. then a page from nextag
10. then goes same competitor(root of the site with www and normal title)

The above is using IE6 and has been like this for 3 days

if I switch to firefox on this computer, shows the normal SERP as on the different computer

I ask my friend from far away to do a search and he gets slightly different SERP than my normal SERP as well.

[edvisors]

Sorry, yes different rankings across different computers - any thoughts?

[glenng]

Noticed that on the same computer using IE6 and firefox that the results are different?

[martinibuster]

As I understand it, Yahoo is constantly testing their SERPs, so that may be what you're seeing.

[glenng]

found it quite unusual seeing different serp's with two different browsers at the same time.

[rogerd]

With Yahoo's ever-present click tracking, they are probably feeding different results to see what gets more clicks, e.g., put the #15 (or #500) result in the #3 spot a few times and see what kinds of clicks it gets. Or perhaps test a whole different first page of results. Links that perform better could get a boost in the "permanent" rankings.