I just met a jelly gentleman - Impostocube.
the Impostocube seems to be rich enough to always drop a gold coin when killed.
http://wiki.spiralknights.com/Jelly#Impostocube
And... he did not. Did not drop any gold at all, only a heart. Same thing happened last time I met him. I remember meeting him 2 times before double UVs were made and he always dropped a gold coin, but now he seems to be much, much poorer.
Rough economy doubled the price of promade, and Dapper Dan is the only choice for a distinguished gentle-slime as the Impostocube.
But I haven't noticed anything different, and I ran into him in Scarlet fortress the other night.