Bukkit

What steps will reproduce the problem?
1. Buy something from a shop or sell something.

What is the expected output? What do you see instead?
I think that after clicking the item in the shop, the mouse pointer should stay where it is.
Instead, the pointer goes the center of the inventory. This could be frustrating for players that want to buy or sell many stacks of items, because every time they would have to move the pointer back.

What version of the product are you using?
VillagerShop 0.4d
Spigot build 1649

Do you have an error log of what happened?
No, but the error is easy to reproduce.