While botting, I noticed that if you pick up more than two types of cargo the box expands to show the additional cargo but doesn't show them. Opening the jettison menu and then closing it seems to fix the problem until you empty your hold.

Before:
http://homepage.mac.com/awfwal/dump0005.png
After opening then closing the jettison menu:
http://homepage.mac.com/awfwal/dump0006.png

Ok, the fix will be in the next update.