Lost library
The laptop I normally use for Zotero has gone, kaput, so I am using a different laptop. Zotero seems to have completely lost one of my libraries--it had quite a number of items in it and now it only has one. I have tried doing a restore from the server but nothing has come back. Other libraries seem to be complete.
https://www.zotero.org/groups/
If you can provide the name of the library, the Zotero team could check what has happened to it.
I know that this advice is late, but considering that you can get a terabyte USB harddrive for less than 100 euros, there is really no excuse to have automated, full backups of your computer.
About the backups--I thought that the whole point of something like Zotero was that you have a remote copy that lots of people can access? Have I got that wrong? Can you not rely on the stability of that remore copy?
Marilyn
http://www.zotero.org/support/zotero_data#backing_up_your_zotero_library