if one chainring bolt happens to hit the chainstay fitted the correct way round that would indicate a warped/bent spider arm therefore not the chainrings fault.....
I'll have you know i had tightened them all 2 weeks before, however one was missing and the one which is the wrong way around would hit the chainstay if it was the correct way around, no idea what happened to the other two though
if one chainring bolt happens to hit the chainstay fitted the correct way round that would indicate a warped/bent spider arm therefore not the chainrings fault.....