I updated to 2.0.3 and now every time I open the card slot or turn the camera off for couple of seconds, it turns my AF micro adjustment setting to disabled. It still remembers the adjustment value, but is not using it any more.
Out of curiosity, do you have Orientation Linked AF Point set to 1: Select different AF points? I ask because the 1D X had a similar issue on firmware 1.0.2, which was corrected with 1.0.6.
I've updated to 2.0.3 and don't have any problems with either of these issues. I have AF Microadjustment set to Adjust by lens and it doesn't revert to Disable when 7D powered off, or when CF card removed and restored. Using either setting of Orientation Linked AF point does not cause AF Microadjustment to Disable.
Did you try re-installing 2.0.3, afterward being sure to then power off and remove and reinstall battery?
**** IGNORE **** Posted after problem found.......