Thank you for bringing this up.
Ive been trying to figure out where the problem is but since I have no knowledge on Python scripting, it is very hard to come to any actual conclusions.
The only way was to seek a true experts advise, so Ive contacted Ockham asking for some help and he courteously agreed to look into the light set and see if he can spot anything.
Hope well be able to provide a solution soon :o)