That dmesg is peculiar.. I get something similar too but not nearly as long.

For me, I had some minor problems with my card but had quickly formatted it ext2 on my laptop before I really noticed if there was a problem. I remember once having a drive that didn't have partitions setup, perhaps the unit is expecting such a thing? But I thought linux was more tolerant of such silliness. *shrug*

Opted for ext2 instead of ext3 since it reduces the number of writes to the card... though if wikipedia is to be believed, it wouldn't really matter anyways. Chose ext2 over fat32 since I like being able to set permissions on my files even if it means that i lose the ability to use the card with windows machines.