My hoster had problems with the hardware (harddrive damaged). The files had to be recovered from a backup.
It is possible that some forum posts etc. (made in the last hours) are missing.

Moreover all downloads are missing. I'm currently trying to find out if my hoster has a backup of these files. Worst case would be that all user uploads are lost.

Addition: All user uploads are unfortunately lost. It is not possible to upload new files at the moment. Sorry.