id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
507	Twisty on collection is not removed after deleting last subcollection	dstillman	dstillman	"From http://forums.zotero.org/discussion/309/


  ''When I delete the last subcollection of a given collection, the [+] and [-] buttons (to the left of the collection name) remain visible, though of course they no longer do anything. The buttons are no longer visible after Zotero restarts.''"	defect	closed	trivial	1.0 Beta 4	interface	1.0	fixed