Hi James The Acrobat issue has fixed itself today ! Not sure why it has but it has. All I can say is that I have been installingf a few new packages such as Mozilla from unstable and the latest 2.4 kernel I have also done a reboot. All of a sudden it works fine with no error messages.
So I guess you could try an apt-get update, apt-get upgrade reboot and see if works. NB I am using a mainly Woody system with a bit of unstable thrown in for good measure. Pat