My company has a serious institutional problem. We use PowerPoint religiously, and our Operations team has made a point of keeping our slides up-to-date and error-free. Unfortunately, most people aren't in the habit of using those slides - they're in the habit of looking through their old emails, finding an old PowerPoint presentation from two years ago, and using it as a starting template. This is causing hideous problems, not just in obvious spelling and grammar errors and inconsistencies but in the potential for flat-out mistakes; e.g. suggesting we have clients that are no longer clients. It's clearly a problem, but no one outside our team and the highest leadership seems to care enough to stop doing it.
Have you dealt with this problem? Did you find a solution? Would you lean toward a social solution (finding a way to change the behavior) or a technological one (causing documents to expire, or something like that)?