Seeing incorrect answers get "accepted" makes me seriously doubt the value of Stack Overflow. For example, this answer about Perl's symbolic references was accepted - but any competent Perl programmer knows that it's a horribly poor approach, and the answer that says as much outvoted the accepted one by 15 to 0 (as at 12/11/2008).
Is this a technical site that values accuracy, or just a popularity contest? I was hoping for the former, but examples like the above make it look more like latter in my opinion.
A related question: Maybe a delay of 24 hours or so before any answer could be accepted would be helpful. I get the impression that many of these cases aren't "gaming" the system, they're simply newbies accepting the first answer they get that seems to help. A waiting period would allow them to see what everyone else thinks of the answer - maybe they'd be more cautious about accepting an answer that's voted down to oblivion and loaded with comments that say "no, that's wrong."
Related question: Etiquette for correcting old questions with incorrect answers
Here is a list of problem questions I compiled.