Happened to me - heard a terrible noise in the kitchen and found that the inner glass was spinning round in the washing machine. Fortunately the outer glass was still intact so glass was only in the machine not in the kitchen.
When we looked at the guarantee we found out the glass was specifically excluded. We ignored this and called up Miele anyway, who came round and put new glass in - but for well over a year we'd find bits of glass in the filter. As time went on they were progressively more smoothed down.
That was about three years ago, and the machine's been fine ever since.
Could not believe what happened today the glass in my 13 month old Miele washing machine exploded, googled and found out that this is not uncommon in Miele machines and other brands. Dread to think what the injuries would have been had my children been near the machine at the time, scary stuff, spinning and glass flying out of the machine.