JTabbedPane's tab is unlike the Native TabbedPane's Tab on Mercury.
The Border of the Tabs is different from the Native Tabs.
Steps to Reproduce:
-------------------
1) Run SwingSet2 on Mercury.
2) Go to TabPane Demo.
3) Notice the Tabs and the border.
4) Now open Gedit (or same other Native app with Tabbed Pane)
5) Notice the Tab and the difference between the Native and Java implementations of the same