Can't make Akonadi server / Nepomuk service run

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https://bbs.archlinux.org – I'm currently running KDE SC 4.9 on Arch Linux x86_64, system fully up to date.My laptop's HD went dead some days ago so I had to restore my system from a 2-weeks old backup; I usually use fsarchiver to backup root partition and 7z to compress ~/.kde4 and ~/.config so this way I'm covered up about these kind of things.So after restoring my system and home folder I did a full upgrade (nearly a gigabyte of downloads) and while most things seems to work well I found that Nepomuk isn't running, when I try to start it manually I have this error message:"Failed to start the (HowTos)