Ignition coil failure

[nfsdave]

My '04 G35 coupe just turned 33k miles. About 1k miles ago, the #3 cyl. ignition coil failed. A few days ago the #2 coil failed, so I had the shop replace all 5. This time the engine ran pretty rough with the SES light appearing and then going away etc. It seemed odd that everything was fine till the engine warmed up. When the 1st coil failed, the shake was less and usually noticeable at idle only (light came on though).

Anyone else have this problem? The guys at the shop said they hadn't seen coils (2) fail at such low mileage.