Like I said, it is a hashing issue, sometimes it will be correct by accident.

I hope you did not have to much trouble with this bug, I guess it must have been hard to chase.

The hardest thing often is to suspect the system or external libraries, but it wasn't that bad.

Is it urgent ?

I can rehash it for now (I have a trivial case), but it should be fixed eventually (it wouldn't be so easy to rehash more complex structures).

Thanks,

Peter