I have a Macbook running Lion, and when I try to set the default PDF viewer as 'Adobe Reader' - it works until the next time the computer is taken outside of its current network. The default for PDFs will always switch back to 'Preview' rather then staying set as 'Adobe Reader'.
I have tried installing an Automator script (Lion Network Home Folder Launch Services Fix) that claims to fix the issue, however the problem still occurs.
Does anyone have any idea why this happens and/or a solution?
Edit: I should have mentioned this is for an end-user in a domained work environment. The issue occurs when they take the notebook home or off-site.