graeme_p - 10:31 am on Feb 1, 2012 (gmt 0)
Its not IE, its Chrome : it is partially justified by adopting the same frequent release practice as Chrome.
It is linked to the dropping of support for past releases (i.e. if you want bug, including security, fixes you move to the current version), which they subsequently compromised on.
The idea now is that there will be rare stable releases (for organisation that want a stable platform) and very frequent releases of the latest version. Its a bit like Ubuntu, except, I think, the support for the current version will cease as soon as the new one comes out (except Ubuntu provides 1.5 years support for six monthly releases).