Takashi, like I said, *I* didnt do anything. *fortunately* btrfs / partition crashed this morning, could not be repaired, so i had to reinstall. I will be filing a bug for that, ;-) While / after reinstalling I noticed that while installing the owncloud package, it changes default repositories maybe the reason for that. anyway, I am on 4.1.36-44-default now. best Rens