We rarely ever hear of Ask.com updating their search index or algorithm. We rarely ever hear of Webmasters complaining or praising Ask.com about a recent change in the search results. But we have a solo post at WebmasterWorld from a member who has been there since 2002. The post says he has noticed a major change with Ask.com's search results.
WebmasterWorld paladin said:
Seeing some significant changes in the SERPs here. Most are positive for my sites which makes me a happy camper.
I have not seen any reports from any other forum on an Ask.com update. Also, the last time I reported about an Ask.com update was in October 2007.
I personally have been watching Ask.com over the last week or two for improvements in their index depth and freshness. I have been also testing that index for improvements in their query processor. The tests I have been running have continued to be very disappointing, to say the least. This comes after a year since announcing the Ask.com's new search technology, code named Edison.
Forum discussion at WebmasterWorld.