I'm working on a client site that was set up by another developer (which is why I can't update it to 3.2.1). However, I'm now running in to a curious issue.
Whenever I attempt to activate the Relations Post Types plugin, the site fails. Instead of seeing the dashboard or blog front-end, I'm presented instead with an error page for an "empty result."
I can deactivate the plugin just fine via FTP ... but I can't get things working without this plugin!
I've also tried testing this locally on my machine, on my personal production server, and on a friend's VPS - the plugin works everywhere else.
I tried looking in the Apache error logs ... but they don't claim anything's wrong. Where else can I look to diagnose this problem?