Hi Stef,
The code was always somehow broken because it tries to do too many things and putting Array and Set in the same pot does not work well. I do not know how to fix it to work with everything, but for now I am only using it for SequencebleCollection anyway. The test is red just to keep a reminder.
hani is using sets but apparently is not able to send email to public forum. So it really helps.
So I will fix it for Array and Set with a hack.
Stef