My error messages go like:
Error opening document <file path\filename>.pdf: Error: [PDF Structure 40]: Invalid property type
I attempted to update the adobe software,but this has not reolved anything.
I also installed PDF-XChange viewer to see if this would help, but no. Very weird and I do recall a similar problem on the last PC (XP); current PC is Win7 64-bit.
Its not all documents either, and if I get real stuck I download/ print from my PC at work...