on my server when i press the skin in the repair bench, nothing happens... i think one of my plugins is causeing the problem
List of plugins:
N teleportation
Vanish
betterloot
gathermanager
quicksmelt
R-remover tool
time of day
crafting controller

If you think its them -> Unload all of them and try. Then you will be sure

same problem
Also cannot craft with skin

Empty server, no plugins

how to get the plugin 

I'm having this problem also. I have tons of mods to unload them all one by one. Anyone got another approach or is it the only way to pin point the problem?

o.unload *

Merged post

Are you guys on Win or Linux servers? Mine are Linux and no problems here.

Didn't think of *
Will run some tests when users are offline. I'm on a windows server.