It would help if Preview wasn't really keen on editing the document, though. I find it tries to modify PDFs quite often -- I think it happens if I accidentally

It would help if Preview wasn't really keen on editing the document, though. I find it tries to modify PDFs quite often -- I think it happens if I accidentally click on a table as I scroll through the document. I have resorted to 'chmod 0444 *.pdf' on my folder of datasheets and manuals so it can't mess with what I want to be a read-only file. Preview is the only pdf viewer I've ever needed to do that for. I've never wanted to edit a PDF, so personally I'd rather the feature was gated behind a menu option or something so you had to deliberately ask for it.