Descriptive Problem Summary:
I created a new project and made the default icon_size to 16. I then proceeded to make 16x16 icons to add into the map. I discovered that the icons do not actually show up. I checked the spelling in the code thinking I might have spelled something wrong but it all checked out good. I couldn't figure out the issue so I change the default icon_size back to 32 and recompiled. The icons were now back so I returned the default icon_size back to 16 and this time they stayed. I eventually figured out that any time I create a new icon/icon_state I have to do this process over again.

Numbered Steps to Reproduce Problem:
(Steps are in the description)

Expected Results:
The 16x16 icons to show up.

Actual Results:
They appear as if they have no image assigned.

Does the problem occur:
Every time? Or how often?
Everytime a new icon/icon_state is added to a default of 16 icon_size.

When does the problem NOT occur?
Icon_size 32

Workarounds:
(Also in the description)