Hi, I have the same problem with 9.04 (Jaunty 64 bit = 2.6.28-11) on a Dell XPS 
M1330, with the internal Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter 
(rev 22). 
The same SD cards work perfectly on an external USB reader. I didn't have any 
problem on Intrepid 32 bit.

Following a similar bug
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/323159) I've found
a simple workaround - add the line:

blacklist sdhci


to /etc/modprobe.d/blacklist.conf


Hope this helps ;-))

** Attachment added: "dmesg output"
   http://launchpadlibrarian.net/28027078/dmesg.txt

-- 
Ricoh R5C822 SDHC Card reader I/O errors
https://bugs.launchpad.net/bugs/247819
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