Mouse cursor is default cursor over TextArea's scrollbar

Testsuite name: Regression
JDK/JRE tested: jdk-7u12-ea-windows-x64.exe (jdk7u12b05)
OS/architecture: x64
Reproducible: Always
Reproducible on machine: win7-x64

Instructions:
1. Place keyboard cursor inside TextArea.
2. Repeat steps 2.* for each of two TextArea's scrollbars.
2.1. Place mouse cursor over TextArea's scrollbar.
2.2. If mouse cursor is not HAND_CURSOR, test failed.
2.3. Type any symbol into TextArea.
2.4. Type ENTER symbol into TextArea.
2.5. If mouse cursor changes, test failed (if cursor disappears on Windows, it's OK).
3. Test passed.

Actual behavior:
After placing mouse cursor over TextArea's scrollbar, mouse cursor is default cursor. refer to Test1.jpg.