Bukkit/Bukkit — comment on commit 31876058a49c939b8c3d52ee8771421d48e64bac
File:  line 0
By Wolvereness:

Remove the label "commands" and it works. The issue is from BLANK labels, ones that have no content. You aren't required to put but 3 things in the plugin.yml (being plugin name, version, and class).