Jochen,
you can test by simulating the output from pv.exe to include the line NAV would produce. Here's the tail end of my C:\RC.TXT
code:

rtvscan.exe	1456
KIX32.EXE	2680
cmd.exe	2536
pv.exe	2376

But then, moot point, as I can't reproduce results of last night. Like I said, feels like a bad dream, only it wasn't.

p.s. I'm sticking with my invisible garbage theory.

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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.