SD card errors on resume after suspend, joyride 1634 firmware q2d12

[Mark Bauer]

This happens maybe not every time, but at least 50% of the time,   
when I wake from suspend (or sleep),
the SD card returns an error

df: '/media/SD1': Input/output error

Then it mounts in on /media/SD1_1

Any ideas

It is a 2 GB sandisk.

Thanks


Mark