Wordpress is technically computer software, but it is also programming and development. So where should I ask a question about a WP plugin on SO or SU?
Questions on what WP plugin to use, how to install the plugin would go to ProWebmasters StackExchange
Questions on how to program or debug a plugin would goto StackOverflow
Question doesn't fit on SU as the SU FAQ clearly mentions:
it is not about …
- websites or web services like Facebook, Twitter, and WordPress
There is a new SE site dedicated to WordPress, currently in public beta. I think that, generally speaking, if your question involves WP, that site is the place to go.