A now closed discussion on duplicate detection in version 3.0b1 (http://forums.zotero.org/discussion/19230/30b1-duplicate-detection/) elicited the response that it was not possible to confirm detected items as non-duplicates. Is there any advance on this? It really is necessary, in my view. Zotero mistakes far too many items as duplicates - different editions of the same work, separate volumes of the same series, separate reviews of the same book, subsequent publications by the same author with similar or identical titles to earlier works, and so on. The work-around proposed in the earlier thread was to suspend duplicate detection for offending items. This is unattractive as an option, and I'm not sure it's available anyway. Essentially, whenever there is an algorithm that checks criteria to make a prediction there is the possibility of the prediction being wrong and there needs to be the option to correct it, surely?