I would like to add my "two penneth" worth, as we say in the UK if thats alright?

I have hydocephalus; have had it since I was about 12 weeks (ergo, probably in the womb), I have had about 48 shunt replacements (so many I often lose count) which have been blamed on a great many things, for example "ring worm" and "being allergic to the coating"...all false dawns, but anyway, I digress...I recently spent 3 months in a round-the-world trip which went as follows: London-NY-(Overland)-LA-NZ-Aus-China-Thai-India-Doha-Italy-(Overland)-UK...from that vast amount of flying I undertook, I have never experienced any trouble. What I'm trying to say is that I certainly agree that it must either be under very special conditions or on an individual basis (although I agree completely about the cabin pressure point, have a look at a potato chip bag the next time your on a plane, the pressure inside that bag for it to pop out is not "normal" - and that is happening to your brain)

Darren (H0ckeyd)