Never mind, I figured it out.
It was all a problem of not-quite-accurate man pages.
I found the man page (well, xml file) in the git tree and just added an ATTRS
match to the top level USB device.
This worked:
KERNEL=="ttyUSB*", ATTRS{bNumConfigurations}=="*", RUN+="myprog %p %s{idVendor}
%s{idProduct}"
Sorry for the noise, thanks anyway.
But I might add that there is certainly some documentation lacking on this one,
practially everything I found was outdated or inaccurate ...
Josua Dietze
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