When the kcm_phonon module loads, it thinks it has configuration changes even though you haven't changed anything. Reproducible: Always Steps to Reproduce: 1. Run System Settings 2. Click Multimedia 3. Click the Phonon tab. 4. Notice the Apply button is enabled. 5. Press the Overview button to get back to the main settings screen. Actual Results: After you do step 5, you will get a dialog box that says "Thee settings of the current module have changed. Do you want to apply the changes or discard them?". Expected Results: The dialog should not appear, since you didn't change anything. If you click Apply on the dialog, and try again, the same thing happens.
*** Bug 314988 has been marked as a duplicate of this bug. ***
I think this has been fixed by the patch in https://git.reviewboard.kde.org/r/110390/