Hi!
We use PNet on functional programs that often requires large code stacks.  As such, we got used to run our programs using ilrun -S 4096.  Since several versions (at least 0.6.10), this size causes programs to loop endlessly.  4087 seems to be the highest valid size.
I could not reproduce this behaviour on a simple "hello!" C# program, but here is a small test program, corresponding to the Bigloo recette (http://www-sop.inria.fr/mimosa/fp/Bigloo/) stripped down to an empty module that only launches the Bigloo runtime and then terminates.
This program runs correctly when launched using ilrun -S 4088 -C 256 recette-dotnet.exe, but loops endlessly as soon as one increases the stack size.
Best regards,
     Yannis