Icon Packager & Workshelf

I find that when I add an item to Workshelf, instead of it accepting and using the provided icon, it uses a default blank icon. There is a way around it by using Workshelf's "change icon" function" but it's a nuisance and doesn't work in all cases. I know this is due to the mix of Workshelf and Icon Packager because it doesn't occur when IP is uninstalled.

 

Does anyone else use these 2 packages, and do you have the same problem ?