I was just about to post a list of globals in your code, but I see you've already got it covered. Congrats on getting it working, and improving your coding style.

You can read about issues with globals and other things in the mod_perl guide. By the way, this is what I meant about possibly using Apache::PerlRun instead of Apache::Registry. Apache::PerlRun will clear globals, which would have made your code work, but it's not as fast because of this.