Hashdata from server too small

Hi,
I get this message in errors log.

http://img710.imageshack.us/img710/6363/0eoy.png

Why does it complains about hashdata ?
The “status page” show the backup as “OK”. Is it really ok ?

Thanks.
Eric

It probably shows OK, because there still is a recent image backup, even though the last one failed.

The error can be caused by a change in the size of the volume that is being backed up. Forcing a full image backup fixes it. Is that the case?

Yes it is the case.
Thanks.

Eric