I got similar problem yesterday after I upgarde from Ubuntu 13.04 X86_64 to 13.10 X86_64.
I was using Eclipse-CDT (Kepler) for some development and it works well on Ubuntu 13.04. However, after upgrade to Ubuntu 13.10 (beta 1) yesterday I found I could not have Eclipse menus (located in Unity's top-panel ) droped down. I also tried to download a new copy of Eclipse but it was the same.
I got similar problem yesterday after I upgarde from Ubuntu 13.04 X86_64 to 13.10 X86_64.
I was using Eclipse-CDT (Kepler) for some development and it works well on Ubuntu 13.04. However, after upgrade to Ubuntu 13.10 (beta 1) yesterday I found I could not have Eclipse menus (located in Unity's top-panel ) droped down. I also tried to download a new copy of Eclipse but it was the same.
It seems for me something wrong in 13.10.