Summary: In the Documentation pane of Xcode's preferences, there are checkboxes to turn on or off various documentation set location. However, if you change these preferences, the new values are not saved after Xcode relaunches. Steps to Reproduce: 1. Launch Xcode. 2. Open Preferences. 3. Select Documentation. 4. Click checkboxes to turn off some locations. 5. Click Apply or OK. 6. Quit Xcode 7. Launch Xcode. 8. Open Preferences. 9. Select Documentation. Expected Results: The checkboxes I turned off in step 4 are still off. Actual Results: All of the checkboxes are on. Regression: If I recall correctly, this also happened in earlier versions of Xcode 3. Notes: If you have a workaround for this bug, I'd appreciate hearing it.