No panel, launcher and window decoration in Unity after using KDE

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http://askubuntu.com – This is not a bug. I used KDE for months and I installed many things to make GTK apps look native in KDE 4. Now I upgraded to Ubuntu 12.10, but Unity does not show launcher, panel, and window decorations. This is a problem with Compiz and KDE packages I installed (like oxygen gtk theme and settings), but I don't know which ones I must remove. (HowTos)