inconsistent icons in KDE menu and yast

I've installed and changed the icon to 'compass icon', but the icons didn't show up correctly in the menu(application launcher).

OK, that's fine. But ...

some icons didn't change correctly. And in kubuntu, icons just display correctly.
Also, the icons in yast do not changed. So is there anyway can fix this proplem.
PS:As this is my first thread posted, please figure out the problem where i'm wrong or the inappropriate format. And sorry for my poor English.