I installed Fedora 20 Beta TC6 in qemu:

ionice -c 3 qemu-kvm -enable-kvm -global qxl.ram_size=1x1024 -m 2048M -smp 4 -drive file=./Fedora-20-Beta-TC6-x86_64-netinst.iso.qcow2,index=0,media=disk,cache=unsafe -localtime -serial file:/tmp/qemu-Fedora-20-Beta-TC6-x86_64-netinst.iso.qcow2-output.log -name Fedora-20-Beta-TC6-x86_64-netinst.iso.qcow2 -cdrom /local/mfabian/iso/Fedora-20-Beta-TC6/Fedora-20-Beta-TC6-x86_64-netinst.iso -boot c -spice port=6000,disable-ticketing -vga qxl -display vnc=:4 -net nic -net user,hostname=Fedora-20-Beta-TC6-x86_64-netinst.iso.qcow2,hostfwd=tcp::5556-:22 -monitor stdio -usb

- Japanese default installation (should not matter, I think)
- After the installation finished and logging into Gnome
  I installed KDE as well with
  “sudo yum groupinstall kde-desktop-environment”
- Log out of gnome
- Log into KDE
- There is an ibus icon visible in the panel
- Clicking it with the left mouse shows input methods,
  ibus-kkc (日本語 - Kana Kanji) and ibus-anthy (日本語 - Anthy)
  and a keyboard layout (英語 - English (US)

  (Side note: Why Anthy is there I don’t know. I didn’t add it,
  it was already there. The ibus-anthy package is installed, I
  installed that manually before when testing on Gnome).

- Click with the right mouse button on the ibus icon pops up
  the menu:

  設定 (P)                     <- this means "Setup"
  このアプリケーションについて(A)
  -------------------------
  再起動
  終了(Q)

- Click on 設定 (Setup)
- The desktop may freeze already now
- If the desktop does not yet freeze, the setup tool window of ibus
  opens.
- Most likely the desktop will freeze now.
- If it still does not freeze, click the
  インプットメソッド (= Input Method) tab
- Check the checkbox in front of
  アクティブなインプットメソッドをカタマイズする(M)
  (= Customize active input method)
- Open combobox
  インプットメソッドの選択
  (*Very* rare to get that far, usually it freezes much earlier)
- The item at the bottom of that combobox is
  すべてのインプットメソッドを表示する (= “Show all input methods”)
  Click that.
- If you are very lucky and it still doesn’t freeze,
  click the combobox again and try to add some additional
  input method.


Result:

Usually the desktop freezes very early in that procedure.
With “freezes” I mean that I can only see the mouse cursor moving,
but that’s it, it is not possible to do anything else anymore
(close windows, move windows, focus windows, type, nothing works).