TSA now has an app. Also on this link, is a "can I bring my..." search box. You enter the item you're not sure about and it will tell you 1) if you can bring it and 2) if you can bring it in your carry on. Handy!
TSA asks passengers to remove all paper items from Carry-on bags in new pilot program. Originally posted to r/kansascityhttp://www.kshb.com/news/local-news/kci-passengers-say-security-asked-them-to-remove-all-paper-items-from-bags