The Daily Mash still spells it the traditional way:
I spotted the alternative spelling "miniscule" in a BBC article today, but I can't track it down again.
While trying to find it, I realised to my horror that the BBC have been spelling it "miniscule" since 2003.
I personally am not bothered whether we spell it the traditional way, based on its word stem "minu..." ('minute' as in 'very small', not 'minute' as in 'sixty seconds') or phonetically as "miniscule" but can we please make up our minds?