Originally Posted by Martinscholes

Ah. This reminds me of something.

I used to work for a large telephone directory enquires firm in the UK. We had three servers. Each server had the same data set on it. But often they would throw up different returns on a search.

I.T. had various answers as to why this happened including that the servers were rebooted at different times and took a while to synchronise, so would give different returns while this was happening.

Might be a similar problem with Google?