[Five]

I haven't seen this problem before. if you're still under warranty you can exchange it (I think its 2yrs). all I can find online is mention of the disc problem with some batches... if you can, try your hi-md disc in another hi-md recorder, and also try formatting an old style regular md disc and see if that works.

also you might want to register on the board at minidisc.org and check with them... they really know their minidisc over there!