Can't change themes :(

[KD-120RD]

Hi kde gurus, I need your help.

I have ~kde4 (@kde-4.3 set) installed and I cant change my desktop theme. (air, oxygen, ...)
In systemsettings -> advanced -> desktop theme details: The apply-button is always grayed out. No matter which theme I choose. Same with downloaded themes. They do appear in the theme selection box, but I cant apply them.

Maybe a configuration issue? But, no prior KDE4 version were installed on this system. I switched from 3.5.10 to 4.2.91.
Am I missing a package? Again @kde-4.3 is installed.

Help appreciated
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[Decha]

Same issue here. Wasn't the case on amd64 but present in x86.

After global theme change in a dropdown list, apply is just grayed out. If individual component theme changed - apply is available but has no effect. Tried to wipe out "~/.kde" - no effect.

Any ideas?

Thanks.
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When It's Done - It's Done!

[Decha]

Update:

KDE-4.3.2.

Was able to change theme via Right click on Desktop => Desktop Settings -> Desktop Theme. Better than nothing
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When It's Done - It's Done!