Quote Q2Lummox:

"I found a bug that makes the plugin "iprofessions" malfunction.

If you add a crafting a job, for example adding only the lumberjack can do wooden axes. If you do not have that job, you can not crafting ... Now, if you try crafting, instead of taking the ax and put it in the inventory, if you press Shift, and hit the ax just created, you add it to your inventory.

This video, with iprofessions + stackableitems plugin installed:

http://www.youtube.com/watch?v=zuptiUrU7W8&feature=youtu.be

And this one, only with iprofessions:

http://www.youtube.com/watch?v=jtIS394ZvFQ&feature=youtu.be

Your plugin interfere with the operation of this another plugin. Can you fix it?"

iProfessions hasn't been updated in over a year and I have no plans of supporting it at this time.