Can I search for existence of attachment?
Zotero has the blue vs. hollow circle to show whether an attachment exists on the local computer. I can sort by this, so it's quickly accessible, but is it possible to search for it? In other words, could I create a (saved) search for all items that have an item that's missing on the local machine?
Also, a relevant (and timely) XKCD: http://xkcd.com/1246/
=> When there's more than one attachement, if at least one of them is not available locally (or has an incorrect path, etc.), the blue circle next to the *parent* item should be empty/hollow. Otherwise (i.e. atm) you can't sort together all the items which have a missing attachment, and that makes them a bit difficult to find.