Nah, the included file is on the same server, just a different directory. I don't know why this is an issue only with the include() functions inside the class methods. There are include()'s in other pages (ie the ones that include the class file) and they seem to work fine.

I check the php.ini anyway for any differences:

allow_url_fopen: open on both
allow_url_include: off on both

Hrm. I looked through my code again this morning and still couldn't figure this out.

Thanks for the tip about switching to use require_once() or include_once(). =)