FWIW, google now declaring victory in rolling out caffeine:
So perhaps we can rule that out?
Yet I'm still seeing lots of plain old buggy instability:
I tried some queries using my domain name to see whether the relevance of the top results improved any - what should be the 'obvious' match came up first only once. More interestingly, though, when I clicked on 'Cached' result, I got errors - in about 8 of 10 cases! Is anyone else seeing this?