Step to reproduce:
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1) Run the attached program.
2) Select 'Scroll tab layout' radio button.You can see the tabs are placed in a row & two arrows at the right side.
3) Select Jtab#1 to 'n' say tab#13 & tab#14 by clicking on the right arrow button. On selecting tab#14 the title come out side the tab. If you see the same then the bug is reproduce.
4) Select any tab after tab#14. The tab are not seen, but the contents of the tabs are seen.

You can described issues with the attached screen shots.
I tested this on Vista beta2 (build 5342) on Mustang b81.
If you click the last tab, then the arrow buttons are disappers.