Wolfie,
Crucial was great about it. Not only did they replace the sticks, I spent a half hour on the phone with the head of their test lab discussing issues with the Tiger MP and going over the reports they'd received from the field, and their own test results. One of the issues that he'd been seeing was a weak correlation between the Tiger MP, 3Com NICs and Crucial memory failure. Sounded far-fetched to me, but what the hell.
I swapped my 3Com for an Intel Pro/100 on December 11 last year, and haven't fried a stick since.
Russ, NCNE