A HighRankings Forum thread asks when did Yahoo stop grouping search results from the same domain together? We reported on an issue with Google not grouping certain results a few weeks ago, but it is rare to see Google not group results in many cases. But Yahoo doesn't seem to be grouping any results from the same domain together, at least not today.
For example, a search on george bush at Yahoo shows three results from the White House web site, and two right next to each other, but none of them are grouped together:
A search at Google on george bush groups a few of the results together, when the domain is the same, including the White House results:
So where did the indenting go Yahoo Search?
The thread also talks about missing how Yahoo used to number the results, but that is an older topic.
Forum discussion at HighRankings Forum.
Update: Yahoo has actually never grouped results. I have official confirmation from Yahoo on that.