I've learned alot about DOD since earlier (and watched telly). Not as straightforward as I thought it would be to find if these traces should be considered serious or not (I would say any logic based on unitialised values will bite one day!).
Ok, now I understand. This is inspecting the C runtime stack (I think). The Interpreter remembers the bottom address, and then when the time comes, a routine runs the depth of the stack.
The values on the stack are then checked whether they are in the pmc or buffer memory ranges.
I guess that there must be automatic variables which haven't been explicitly set on the stack(?).
Last email from me on the subject,
Nick