Bug 73027 [Dialogs] Buttons are too high
I20040831 Buttons are no longer oval but have a rounded rectangle shape (see first screenshot). The second screenshot shows how buttons using the small system font should look like.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/ListEditor.java
downButton = null;
                    buttonBox = null;
                }
            });
        } else {
            checkParent(buttonBox, parent);
        }
        selectionChanged();
        return buttonBox;
    }
    /**
     * Returns this field editor's list control.
     *
     * @param parent the parent control
     * @return the list control
     */
    public List getListControl(Composite parent) {
        if (list == null) {
            list = new List(parent, SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL
                    | SWT.H_SCROLL);
            list.setFont(parent.getFont());
            list.addSelectionListener(getSelectionListener());
            list.addDisposeListener(new DisposeListener() {
                public void widgetDisposed(DisposeEvent event) {
                    list = null;
                }
            });
        } else {
            checkParent(list, parent);
        }