Version: (using KDE KDE 3.97.0) Installed from: Ubuntu Packages OS: Linux I tried to change the icon theme to both a built-in one and a new installed (specifically Crystal Project) but nothing happens. After clicking the Apply buttons is turns to gray, defining that the changes are applied but in truth the default theme is always on. If you go back to control center (after applying the changes) you will see that the theme you have selected is the one highlighted on the theme list again declaring that your settings were correctly being applied.
Is the new theme compatible with KDE4? Anyway I mark this bug as a dup of a recent one which has a bit more informations. *** This bug has been marked as a duplicate of bug 173595 ***