Thread:Greenny/@comment-263488-20130214205611/@comment-409884-20130214215807

IF you look at the your posting above -- some of the categories are RED in color -- this is because they do not OFFICIALLY exist

Someone, placed the item into a "non-existent" category if it is red

Category:tree icons is non-existent but Category:tree icon does exist -- If ends in s (plural) then it should not be a valid category, as a general rule of thumb on the wiki.