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X4506 module on c4510 in hung state - EtherCh ports down.

hello all,

Had problems last weekend and this morning with one of the X4506 modules (on slot 8) on our c4510R (redundant Sups V - IOS 12.2.31 SGA1). Suddenly, the ports on it started unbundling from their EthChannel groups. Even the ports with no physical cable connected are lit up... The end of the etherchannels are c3750s and a Crossbeam fw c25 appliance (LACP configured). They all reported ports down (which were attached to c4510 slot 8). This was perfectly running for almost a year until last weekend and this morning.

The only way to put them back operationally was to re-seat module 8. The Etherchannel groups have members in the other X4506 module in Slot 7 and they were fine. The only other event happening during the failures were the data backups - c4510R CPU utilization was also hitting 92-100%

Appreciate any help or insight to this problem.