Flange failure, radial lacing

See other failures under 000.html.

From http://www.strangersracing.com/images/suntour_cracked.jpg as of 2006/07/16.

SunTour Superbe Pro, appears to be 24-spoke radially laced. Commentary at http://www.bikeforums.net/archive/index.php/t-121795.html says

i love these hubs, and i hate destroying them. here's the story:

suntour superbe pro track hubs built radial in the front and half-radial in the rear with black wheelsmith DB14 spokes to black mavic cxp30's using silver (brass) nipples. i fn loved those wheels. this dude took three spokes out of my front wheel with his right pedal as he put me on my ass at kissena. limping across the infeild i consoled myself by thinking i already had the extra spokes, and i could rebuild them the next day. upon closer inspection, though, i discovered small cracks running outbound radially from about half the spoke holes on the front wheel. surpisingly, when i looked at the rear wheel, which didn't really suffer any impact in the crash, i found the same thing on the radial non-drive side. mtrfkr! when i returned home, i asked my friend to check his wheels, which i had also built with practically the same components, except the rims were silver cxp14's. this is the same wheelset that survived the head on collision into the barrier i described in my previous post. he found the same thing on his wheels. breaks my heart.
i build using a wheelsmith tensiometer, and i follow wheelsmiths recommendation of about 100kg. the only thing i can think would have caused the cracks is too high tension. anybody?