The Adata 1gbit that I have here has worked properly with every version so far.
Try 0.4 and 0.5, and let me know if it persists.
Also try cleaning the contact points on your SD and blow out the SD slot on the MK. Something might have gotten in there.
If it doesnt mount at first, press B on the MMC logo, then press A - try this a few times, it might pick up.
(Just suggestions, one of them may work for you.)