The plugin ImageMaps attempts to spawn an item frame on a block, but gets an IllegalArgumentException. As far as I can tell, ImageMaps calls World.spawn(), which calls EntityHanging.survives() which incorrectly returns false. This worked on 1.7.9, but fails on 1.8.

Exception: http://pastebin.com/YTXeCUv0

Plugin: http://dev.bukkit.org/bukkit-plugins/imagemaps/
Plugin source: https://github.com/SydMontague/ImageMaps/blob/master/src/main/java/de/craftlancer/imagemaps/ImageMaps.java