It has happened to me before on an older machine and using an older version of Firefox and on a reasonably regular basis that I stopped using the programme for a while and reverted back to IE. With a new PC I downloaded the new version about 18 months ago and it's been wotrking without a glitch until this evening (and yes, it has been downloading it's upgrades like a good little system).
Any help would be very appreciated (but won;t be read until Sunday morning as I'm off to bed now).
OK. I have used my limited computer-fu and have found a cached file with all the details in. I'm manually entering them all again now though as I couldn;t work out how (or if) I could bulk dump them.
So much for an early-ish night...