I’ve dealt with Adobe Reader 9 printing garbled characters/garbage for a few years now with my clients and I’ve never found an actual fix. It is happening with Adobe Reader X as well. My best answer has been to leave the document open until printing is complete and it seems to prevent the problem, but how can this go on for so long on so many computers? I’m talking about multiple computer makes, models, ages, various printers.
Maybe I can get some answers by showing up on Google and working with others! Please comment if you have suggestions.