I am sorry to say that I have had to disable [Trade] signs with immediate effect after a serious and unfixable dupe involving them was brought to my attention.
[Buy] & [Sell] signs are unaffected by this and will continue to be used in the admin shops.
I realise it's less convenient but shops wanting to trade for money will have to use it in it's item form, and trade Industrial Diamonds via trade-o-mats instead.
Myself and niki2008 have been through all the stores at spawn and removed the signs, money and/or items belonging to shop renters have been put in chests in the shops or added directly to your balance, we have made sure that no-one loses out by rounding items up to whole stacks in many cases.
Apologies for any inconvenience this causes but if we had not acted quickly then the entire server economy could have been undermined.
Shops outside of spawn:
If you have a shop/mall outside of the spawn area which has [trade] signs then do not destroy them as you will lose any items/money they contain, instead open a modreq so that myself or Tatankore can get your items and / or money back for you.
Once the sign is destroyed we cannot return the items and / or money.
