[moose8]

So I recently took the plunge into tubulars and on my second ride I had a little problem - I'm not exactly sure what happened, but six driveside spokes broke - I assume I somehow had the rear derailleur adjusted wrong and must of just hit the spokes or something. The derailleur itself was fine though and was set properly, or so I thought, when in the stand. Regardless, six spokes ended up broken. Anyway, the bike shop just called and said that a rivet broke in the inside of the rim and can't be fixed or retrieved so they are beyond repair. A couple of questions:

1) has anyone had this happen, and if so are they truly goners? It sounds like it.

2) would the derailleur be the most likely culprit, or could the rivet have popped before the derailleur? It doesn't really matter either way in the end, but I am curious as to whether it was my bad mechanic skills (which seems highly likely) or if I just got unlucky with the wheel.

Thanks