Lost content of last-but-one partition after deleting last partition and "updating partitions"!

Hi,

bit of worrying to me: within a "partitions area" I just emptied the last partition , and clicked on the "Update partitions" button. This action deleted the last and emptied the last but one partition! (Luckily I can recover partition 5 in a couple of minutes.) Could you please check this behavior?

Additionally within the "partitions area" "general"-tab there are two "Update partitions" buttons.
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Thanks
Carsten

PS: It actually also deleted two buttons (forward and backward) at the end of the partition before the last but one partition.

PPS: again: this time I added a new partition, then saved the form, then "updated partitions" -> the partition has been added, but the last but one partition has been emptied, and the one before lost two buttons at the end.