No. But you have a bigger problem.
It is stored directly on a Synology NAS.
iPhoto needs to have the Library sitting on disk formatted Mac OS Extended (Journaled). Users with the Library sitting on disks otherwise formatted regularly report issues including, but not limited to, importing, saving edits, sharing the photos and deleting. As long as you have the library on an inappropriately formatted disk you will have issues.
Thanks for this very fast and helpful reply. So I made the switch to my local harddrive, rebuilt my iPhoto library with the iPhoto Library Manager from Fat Cat Software (great tool) and I'm backing up to my Synology NAS via TimeMachine. Hope everything will work fine now.
As TimeMachine is saving sparse-bundles (disk images with HFS+ inside) there should be no more problems because of the filesystem. Is that true? Anyone having experience with iPhoto libraries backed up on Synology NAS?