On some distributions of Linux when running Eclipse and applications derived from Eclipse the buttons on dialogs whilst accepting clicks do not seem to do anything.
After some minutes of frustration and even more minutes searching for an answer on Google I found this https://bugs.eclipse.org/bugs/show_bug.cgi?id=291257 Any way the temporary solution is to set the environment variable GDK_NATIVE_WINDOWS to 1 before invoking the Eclipse launcher. For example, use a script that implements the following:
#!/bin/sh
export GDK_NATIVE_WINDOWS=1
/usr/local/Eclipse/eclipse/eclipse
Another workaround would be to try using the keyboard’s space bar to make a button selection, but this gets a bit tedious.
Alternatively wait patiently for the advent of 3.6.