Thanks Marco, if you run into it again certainly it would be good to know! But yes please, concrete examples are absolutely vital. Of course I want you to report bugs so I can fix them but at the same time it's not so good to report a sort of "theoretical bug" that you just think is likely to happen based on extrapolation from some other information. That's because when you raise a big alarm about a pervasive and serious bug it makes me stop everything else that I am doing and try to reproduce it over here.

If you just have a worry about whether something like canceling a fillet is not going to work anymore in v4 because of those scripting changes it's probably better to ask a question about it.

- Michael