If you are using the latest stable versions of either Eclipse or Zend Studio on Ubuntu with KDE installed you might have run into some trouble along the way. If you have oxygen theme installed the IDE will crash whenever you want to create a new project. Or maybe the close buttons won’t work. Plenty of problems.
For oxygen, edit the normally already existing file “/usr/share/themes/oxygen-gtk/gtk-2.0/gtkrc” and change
GtkComboBox::appears-as-list = 1
GtkComboBox::appears-as-list = 0
Works like a charm!
P.S.: The workaround for this is quite old. However since google search does not provide the straight up answer and the problem persists in latest Ubuntu 14.04 LTS I have decided this is worth a post.