the only possibility that crosses my mind is that the internal representation of boolean true/false varies between the two compilers somehow

The thing is that there's only *one* compiler. Irrespective of whether I compile the script with ActivePerl or MinGW-built perl, it's the one and same (gcc-3.4.5) compiler that's doing the compilation.
Admittedly that's not the compiler that actually *built* ActivePerl, but it does use the same CRT as the compiler that built ActivePerl - which is one reason that I expect to *not* be confronted with this sort of problem :-)

The more I think about it, the weirder it seems. I'll play around with it myself a little more today, and then maybe post to p5p as ikegami suggests. I'm a little hesitant to post there as the description of what I'm doing and how to run the demo is somewhat messy - even though what I'm doing is really quite straight forward.
Maybe I can clean the description up a little.

Thanks for the thoughts - and please don't hesitate to present any others you may have. I've added your 2 printf() calls to the script in case they provide some help somewhere down the track.

Cheers,
Rob

In reply to Re^2: GIMME_V==G_ARRAY anomaly on win32 (5.10 only) by syphilis
in thread GIMME_V==G_ARRAY anomaly on win32 (5.10 only) by syphilis

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