This month, WebmasterWorld members spotted a few anomalies in the Google SERPs:
Some people are spotting some huge numbers (and differences) in results found on Google. For example, they could be performing a search in the middle of the day and find 1 million results. Later that day, the same search may find 2 million results. It's possible that this is because of querying different datacenters (though that number is pretty substantial even to me). It's also possible that this is related to capitalization issues which Barry blogged about earlier today.
Other forum members spot Google deindexing some major pages due to what he believes to be a duplicate meta description. He notices that the same pages will end up coming back though.
On page factors are becoming more relevant versus anchor text, as many other forum members are starting to notice.
Forum discussion continues at WebmasterWorld.