I've just upgraded from 1.2 to 1.5, and have always had my index.php file in the root (web) directory, rather than the wordpress directory, and never had any problems. Now with this upgrade, I've managed to set up a theme for my template, and it works with the index.php file that's in my wordpress directory, but the index.php file in my root directory is now broken. I'm getting all kinds of "call to undefined function" errors. This is since I edited the file according to the upgrade instructions to get it to work with themes.
I'd like to be able to keep my index.php file in my root directory, but have it link up to my new theme (and not give me a bunch of errors). What am I doing wrong?