First, before you go any further… check to make sure the image you’re trying isn’t just broken.
I visited the image in the browser and realized that the browser supported the format, so the broken preview had to be somewhere in filepicker.
In my case I was using a(n)
.ico file and since filepicker.io only supports post processing on
.png I had to come up with a work around.
Once I realized the breakage was in the
/convert directive that was automatically filled in for me by the rails gods, the search was on. I dug through the application layer and the gem and I couldn’t get it to relinquish its post processing madness.