using filerstats2bb ext script

Has anyone else been working on getting the filerstats2bb script (filerstats2bb.zip from deadcat.net) working under hobbit? I've been hacking on it all day and I can't seem to get around 2 problems:

1. Keep getting this perl error from the vfilerdiskreport.pl:

Use of uninitialized value in numeric lt (<) at /home/bb/hobbit/server/ext/vfilerdiskreport.pl line 302 (#1) (W uninitialized) An undefined value was used as if it were already defined. It was interpreted as a "" or a 0, but maybe it was a mistake. To suppress this warning assign a defined value to your variables.

As best I can tell from putting print statements through the script, the array passed to the convert_bytes subroutine has an empty value at the end, which causes this.

2. The status changes to purple about 4 mins after the last run. filerstats2bb_wrap.sh is currently set to run every 5 mins, so I don't know why this is taking place. I've got purpledelay set to 15...

If anyone has any tips, I'm all ears. :)

Tom