Just furthur to this, I grabbed your datfile for the testdrivers (0.72u2) from your site.

The missing rom from 'shootgal' was detected, so it must just be something to do with the processing of the -listinfo / -listxml output, I guess.

Also, it came up with 12 roms that are no longer testdrivers :

bombrman
defender
gokuparo
goldmedl
kof2001
kov
liberatr
rranger
slyspy
smgolf
vsbball
xmen