It seems that the matter in libgtk2.0-0 (2.24.13). Downgrade to =<libgtk2.0-0 (2.24.09) or using gtk3-clients solves this problem.
Eiskaltdcpp-gtk doesn't work, but eiskaltdcpp-gtk3 works fine.
Ubuntu 12.10_64:
~$ dpkg -l libgtk2.0-0 libgtk-3-0
...
+++-==============-============-============-=================================
ii libgtk-3-0:amd 3.6.0-0ubunt amd64 GTK+ graphical user interface lib
ii libgtk2.0-0:am 2.24.13-0ubu amd64 GTK+ graphical user interface lib
It seems that the matter in libgtk2.0-0 (2.24.13). Downgrade to =<libgtk2.0-0 (2.24.09) or using gtk3-clients solves this problem.
Eiskaltdcpp-gtk doesn't work, but eiskaltdcpp-gtk3 works fine.
Ubuntu 12.10_64: ======= ====-== ======= ===-=== ======= ==-==== ======= ======= ======= ======= =
~$ dpkg -l libgtk2.0-0 libgtk-3-0
...
+++-===
ii libgtk-3-0:amd 3.6.0-0ubunt amd64 GTK+ graphical user interface lib
ii libgtk2.0-0:am 2.24.13-0ubu amd64 GTK+ graphical user interface lib