Bukkit

removed glitch that you get an stack of items with amount of 0 which you can use - if it is a pickaxe or somethink like that

If any problem still exists, please post everythink my plugin prints to the screen
( like "*date* [ShowCaseStandalone] *some text*" )

may removes the wrong log / wool / s.o.
seems to be a bukkit bug

for more details see: http://leaky.bukkit.org/issues/1342