The second icon in your comment above (256x256) did not show because you did not format the link properly.
The first two numbers after the dash (-) designate size, the icon is only available in the sizes within the icon file.
For example, you cannot have a 4x4 icon unless there is a 4x4 size included within the icon file by the creator.
The last number is always a 32. The link will not work if it is not 32.
You must also place the link within double brackets and the proper beginning code for an icon is "image:icon-image/". Your link should have been formatted as follows within the double brackets: image:icon-image/8352-256x256x32.png
Lastly, I ask that you please use appropriately sized icons in your comments unless there is a specific reason to use a larger one.
