(this is already known but i share for people that dont know it)
when we change imageres.dll or shell32.dll which contain new style icons, for example to my packs i give you blue mac osx style icons, ts sometimes that we see some folders we have made on past to our system dont change looking and not taking the new icons style looking but using the older one.(for example some older folders look in yellow microsoft style)
so, if for any reason, one or more Windows 7 icons are not showing correctly, you can repair by rebuilding the icon cache. Icon cache is a hidden file located at the Local Folder. Here is how to do it:
go to control panel (large icons or small icons) select 'folder options'.
As the IconCache is a hidden file, you need to enable "Show hidden files" option to see the same. To do this, head over to Tools > Folder Options, switch to View tab, and finally enable Show Hidden files, folders, and drive