Thank you Bbungy. I actually paid to upgrade to the latest version of Paragon NTFS before posting this request, but it had no positiive affect. My impression is that the HD directory system has been seriously screwed up by Apple's Disk Utility and that there is no feasible way to step back again. The HD unit does not even mount on Vista any more.
I have also just found out, to my delight, that after paying to upgrade to Lion the card-reader on my MBP no longer recognises SDHC cards and that this problem has hit a number of other users.
it is starting to look to me as though Apple may have released a very flaky operating system upgrade with Lion, creating all kinds of trouble, annoyance and waste of time to users, and providing no apparent corrective .response.
My impression of Apple and my good-will towards the company is being driven ever more steeply downhill by the company itself. If things are as they seem, it is downright shameful in my opinion.
Of course, this brings me no nearer to any kind of useful solution.