[Bug 69085] System Settings changes configuration files (makes fonts blurry) even without me applying any changes

[Frank Siegert]

Public bug reported:

When I open System Settings -- Appearance (only open, not even change
anything, and of course not apply!), it applies some changes to my user
settings, which make my fonts look blurry.

The first unwanted change is in .kde/share/config/kdeglobals (see attached kdeglobals.diff).
The second change is the addition of a ~/.fonts directory and corresponding ~/.fonts.conf (see attached fonts.diff) and apparently running fc-cache.

Both these changes have to be undone (by editing kdeglobals accordingly,
removing .fonts.* and running fc-cache), then after logging out and back
in fonts are back to normal state (it is not enough, to only undo one of
these two changes). The difference between the states can be seen in the
two attached screenshots.

The same happens, when I open kcontrol and its Appearance & Themes --
Fonts section. It also happens directly on the Edgy Live-CD, so it
should be fairly easy to test and confirm.

Summary:
1. (minor) System Settings should not make any changes when I don't hit Apply.
2. (major) It should not create a setting and .fonts.conf which makes fonts look blurry. I have not exactly determined yet, why fonts look blurry if a ~/.fonts.conf exists (it doesn't even have to contain anything between <fontconfig> and </fontconfig>). This part of the bug might belong to another program, e.g. fontconfig.

** Affects: kde-systemsettings (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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System Settings changes configuration files (makes fonts blurry) even without me applying any changes
https://launchpad.net/bugs/69085