Well that's somewhat promising if others are also seeing this.

It however could be that
a) mybitcoin has lost their wallet files like the Polish bitomat site just did and effectively destroyed all the coins.
b) that they have all the coins - but lost the database which tells them who owns what.
c) they have stolen everything but are being cautious about spending/transferring their booty
d) Just a malfunction that's being repaired.. but there are some serious losses so the owner is too scared to communicate.
e) ?

All pointless speculation on my part..  but I hope we hear something soon.