It was just about a month ago when we reported a Google image search update and now I am seeing reports of another update.
A senior WebmasterWorld member posted a thread at WebmasterWorld on the 20th, reporting a new Google Image Search update. Zeus said:
Yesterday I saw some few glitches here and there in the Image search, but today there are some BIG changes, new Images has been added again, maybe also moderate filter update, where they for years have had a problem with loosing good sites images, be cause other sites are hotlinking to those images with bad text, then Google see the Original site as bad.
What is interesting is that we rarely see an update on Google Image Search 30 days apart from another update. There is some speculation that Google might be updating their image index more frequently these days. Like in the past, Google use to update their web index every X or so days, and now they update their web index almost real time - maybe Google is speeding up the image search index?
Google Image search can be a huge source of referrals for many sites, so it would make sense to me if Google decided to update the image index more frequently. Especially since images and video are so much more active these days on the web.
Forum discussion at WebmasterWorld.