Until fairly recently I have been happily using Zotero's auto button to save bibliographical info from Proquest's historic newspapers database -- now it does not work. Every time I try I get the message "An error occurred while saving this ... contact translator author." To make sure that this was not an error with my computer or my particular setup on Mozilla, I tried the same on two additional computers -- all gave the same error message. This suggests that it is on your end and it has to be something that has changed since Nov. 29 when I last successfully used this feature.