I can not gain XP because I am maxed out. The game doesn't need to tell me every time I do ANYTHING that I will not receive more XP. It gets a little nuts ;)
local chat gets flooded with this...and the black pop up messages...and the red warnings on the completed box...
http://i.imgur.com/A1rCf.jpg
"You made Bean Tree Bean (x8) -120 energy. You'll receive no more XP from making these today. The creation process has ceased to stimulate your frontal cortex."