g1smd - 3:33 pm on Apr 15, 2011 (gmt 0)
I just reviewed about 40 answers at stackoverflow discussing redirects and rewrites and related topics. Not one of the solutions given was 100% correct, and most contained serious syntax errors and/or code that was seriously inefficient. If the rest of the solutions on that site, for CSS and PHP and other topics are of similar quality, then there's a heck of a lot of sites running on very poor code.
Sites like StackOverflow are probably nibbling away at WebmasterWorld's share of search traffic.