I also tried the following this morning:
I moved Applications->Adobe to trash.
I moved Library->Application Support->Adobe to trash.
I then re-installed Acrobat reader, but still have the same problem.
When I press Command->p, the File label at the top of the screen turns blue and then reverts to normal, but no print dialogue box.
All other printing works - I can print from Preview as well as Word without any problems.
Any ideas?
Thanks, Hugh.