Hi,
we have exactly the same problem (but we are not bonding and our mtu is set properly). After some network errors and dropped packages we have the state consistent/diskless on three LV as can be seen here:
http://imageshack.us/photo/my-images/42/diskless.png/
There were no errors from the Raid-controller.
How can we come back to a consistent/consistent state?
I have also opened a ticket for this: 1031171