show_jnlp icon is not getting focus when the run icon is opened with offline and online menuitems

Tested build : mustang PIT b96
Tested OS : solaris, linux

Steps to reproduce :

1. Install mustang PIT b96
2. go to jre1.6.0/bin
3. clear cache
4. install notepad application
5. launch javaws -viewer
6. select notepad appln from the java cache viewer
7. keep the focus on Show: combo box
8. press tab key, the focus will be in run icon
9. press down arrow key so that the run icon will be opened with online and offline menuitems.
10. Now press tab key

The focus is not in show_jnlp icon

Expected bevior : The focus should be in show_jnlp icon and
the following 2 tab keys should go to remove and homepage icons

On Windows, it is working fine.