I have recently installed Ubuntu 13.10 on my Lenovo intel core2 duo 32 bit laptop with 15'' screen. Some days back I downloaded eclipse-standard-kepler-SR1-linux-gtk.tar.gz
from the eclipse web site. But after starting eclipse I see the menu distorted.
You can refer the video here : http://youtu.be/fcBHLAlFj4Y
You can try the following command:
UBUNTU_MENUPROXY= eclipse
(Where eclipse is the path to your eclipse)
For more details check out this link