The point is that all of the partitions should be tried to mounted (as previous versions, and lucid a week ago did) but it seems to halt on the error that it can't mount the first partition, or it even not try the second one anyway...
The point is that all of the partitions should be tried to mounted (as previous versions, and lucid a week ago did) but it seems to halt on the error that it can't mount the first partition, or it even not try the second one anyway...