Error ID 210458464; Sync not working anymore

I'm right into finishing my PhD thesis. After I upgraded to FF4 and Zotero 2.1.2 I added some new items to the library. Actually some I have added some items twice b.c. in the first place they didn't have all attachments.

It seems Zotero got some hiccup from it.

At first I got errors saying "getFile can only be called on attachments". But things got worse. This evening syncing (I've 2 computers) stopped at computer 1. Next also on computer 2. So I decided to make a backup of my zotero profile and "reset from server".

After the items have been fetched from the server it tried to get the files fomr the Zotero-storage.
Now this error persists. It can't download the files of the items from the Zotero storage.

I'm really in trouble now!

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