Build ID: 1999102508 Platform: Win32, Linux To reproduce: - Launch apprunner - Select Edit | Preferences - Click on any Preferences category - Double-click on a Preferences category header (eg Mail and News); then, double-click it again to show the list of its children Result: When you click on a Prefs category, nothing changes in the window (ie the category is not displayed). When you hide and reveal the children of a category header, the categories in that section appears as blank (white text on a white background?).

*** Bug 17208 has been marked as a duplicate of this bug. ***

OooP! I should have checked the Browser component.

This is working for me on windows. Rebuilding and checking

I should also mention that this was happening on commercial builds only - not on Mozilla builds.

*** This bug has been marked as a duplicate of 16294 ***

Bulk move of all Pref UI component bugs to new Preferences component. Pref UI component will be deleted.