STORMCAT,
ARP does not yet have any bolts to replace the M8 inner bolts. There are some discussions on-going to convince them to do so. The leading theory is that the bolts ae shearing off AFTER they BOTH loosen at approximately the same rate (weird) and allow the hub to walk off of the splined shaft. As soon as the splines are disengaged, any bolt - ARP or otherwise, would break if subjected to the torque leverage of the wheel. The leading theory goes on to describe that the reason the M8 bolt loosen in the first place is that an improperly heat treated washer warps under the assembly process of torquing the M8 bolts and consequently does not supply the proper seating surface. Ricardo allegedly changed/updated the washers on transaxles that began going on cars in the early 2006 run. HOWEVER, the non-hardened washer theory is going out the window insofar that I believe we have now seen a few cars with the newer washers have the same failure. (Doh!)
Those people who installed drilled M8 bolts and safety wired them are probably in the best shape. Those people that simply had the hardened washer installed - well, perhaps you gave your dealer some needed practice. You may be back.
AMB and/or myself will keep everyone posted on the ARP replacement bolts. Until then, make sure your AAA card is up to date.
Oh, regarding the 6 hub bolts - they are Torque-to-yield (TTY) bolts.
Torque-to-yield bolts are exactly what they sound like. They stretch to the yield point as they are tightened. These bolts are commonly used where exact clamping loads between two parts is called for. During the tightening process, the bolts are pulled to their elastic limit. The bolts actually stretch. Only new bolts can provide the even clamping force.