After Zotero upgrade to 2.0b7.4 there are no more collections

firestarter
Hie everybody I use Firefox 3.5 and Zotero 2.0b7.4 on Kubuntu. After installing the new System I don't see my collections anymore. There is only "My library" left and all the entries which once were ordered in collections are in this Main collection. Also I can't create a new collections. When I press the button Zotero sked me for a name of the new collection. When I gave it and pressed ok, the collection didin't appear. When I look for my library at the web UI of Zotero they are still all there ordered in collection but in Zotero in Firefox. What#s wrong?

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