>     Apparently, Anthony's work ran into some troubles in 
> debugging C codes with a C debugger.

We fixed this problem today. It turned out that there was a slight
mismatch in boundary conditions with #to:do: loops - Squeak evaluates
the upper bound only once whereas the equivalent C code (using for(;;))
may do this multiple times. In situations like these you just have to
resort to a C level debugger since the simulator ran the same code
perfectly nice.

Cheers,
  - Andreas