New
#41
As someone posted a few posts up (the disable auto arrange link), it's possible to change the spacing by changing some things in the registry for the different folder types. So it might be possible that values already stored there for you override the ones you edited in the dll.
Another thing is that the spacing is only for list view if I remember correctly, not any other. For example you can "zoom" in one step from list view (shift + mouse wheel) and the icons may appear as if they are list view but it's no longer list view. So if the customization for Music folder etc. happens to not be list view then that might be the problem.
I'm not really that well informed on how all the folder template stuff works. What I did was whenever I encountered a folder content type that I didn't like, I would set the view setting like I want them and then open Folder Options and click "Apply to Folders" so it saves that type layout.