Not sure what's causing this, but just noticed some orphaned NGUI objects in my scene when starting play.
Selecting them results in the following warning:
"Orphaned UIDrawCall detected!
Use [Selection -> Force Delete] to get rid of it.
UnityEngine.Debug:LogWarning(Object)
UIDrawCallInspector:OnInspectorGUI() (at Assets/NGUI/Scripts/Editor/UIDrawCallInspector.cs:37)
UnityEditor.DockArea:OnGUI()"
Any clue on how to prevent this from happening, or to clean it up?