Yep, I had mine for the same amount of time and never noticed a problem until I had a project that required a lot of out going traffic... it was only like four bytes in one packet out of (on average) 800MB of transfer, but when the data passes the CRC as opposed to being marked bad and simply needing retransmission that can be an issue.
I can only guess that the router inserts a new CRC in the header after performing NAT, etc... dunno, because it only happened when moving through the WAN side. I had the latest firmware and tried reverting all the way back to the original with no luck.
Either way, I have a SMC Barricade 8-port now and love it... no more data corruption, and no more DHCP lease renual issues with a dumb (as in simple microcontroler) network appliance I have.