Google site: operator showing only 30 results for whatever website you may like, omitting the rest

[j.royal]

site:wikipedia.org

site:seomoz.org

site:nytimes.com

site:WHATEVER YOU PUT HERE

is currently always showing just 3 SERP pages and the well known ugly message:

In order to show you the most relevant results, we have omitted some entries very similar to the 30 already displayed.
If you like, you can repeat the search with the omitted results included.

Any idea what's going on?!!? Ongoing update?

[IPROdigital]

It is a temporary glitch caused by Google's domain clustering. It should be back to normal by next week. Matt Cutts confirmed this. Irritating as hell though.

[j.royal]

Thanks for confirming  that it's not a new feature to bother us