It looks like you guys are running into some permission problems, so I've updated karma.pl to hopefully handle it. Just download the ZIP file again and upload the new karma.pl. Then, CHMOD all the files in your Members/karma directory to 777 (if you can, otherwise just delete them).
As for changing the profile writing method, it's actually a lot easier to install new profile fields with the new method than it is with the old one. If there are people willing to read it, I'll write up some instructions on how the new method works and how to convert hacks that use the old one.
