Finder not showing all folder icons properly

[lofight]

I have a small problem with my Mac os X, it's probably very easy to solve but i don't know how. my icons of Documents, Movies and Music is gone. i tried making another account a copying that image in the info box to my other account but that didn't work, what should i do? you can see the problem in the attachtment image.

 

[angelwatt]

I don't have those folders in my sidebar, but when I drag them from Finder into the sidebar it shows them with right icon. You didn't mention how you put the folders into the sidebar, or if the icons changed on their own. Knowing this may reveal something in order to help you further.

 

[lofight]

I don't have those folders in my sidebar, but when I drag them from Finder into the sidebar it shows them with right icon. You didn't mention how you put the folders into the sidebar, or if the icons changed on their own. Knowing this may reveal something in order to help you further.

they were in there from the beginning, but i never really noticed the icons, and one day i looked on another mac, and i saw that mine didn't have them.