I'm baffled as to what might have caused the extraction feature to stop working, when it was working perfectly a few days ago. I am on Win 7, the latest version of Zotero and Zotfile, Firefox 11.0. Since yesterday, I've been unable to extract, though I've tried multiple files and various scenarios. I have only an underscore and text in the file name--no special characters. I've tried getting it to extract as it's being pulled back from my Zotfile folder. I've tried doing it manually from the menu. I've tried adding more annotations. I don't know of any changes to my system or software or preferences. What am I missing?