SwingSet2 Internal Frame Generator partially hides 2 checkboxes(Iconifiable and Maximizable) when switched to GTK Style Look and Feel.

Steps to reproduce:
 - Install 5.0u15-rev-b09 - 64jvm on a sun4u with Solaris 10 (Firefox 2.0.0.4).
 - Run SwingSet2 demo.
 - Have a look on Internal frame generator window, all Four checkboxes(Resizable, Closable, Iconifiable, Maximizable) are visible.
 - Now change to GTK Style look and feel and have a look on Internal frame generator, Iconifiable and Maximizable checkboxes are partially shown.

NOTES:

See attached screenshot.
Tested on all sparcv9 bundles.
Also checked on 5.0u15 fcs- same result.
Bug can be reproduced on both Gnome & CDE Desktops for both 32-bit & 64-bit sun4u-sparc JDK 5.0u15revb09 bundles on a sun4u-sparc machine with Solaris 10u4 installed with latest patches.

Bug does not exist on x86 arch machine. InternalFrameGenerator displays correctly on both Gnome & CDE Desktops using both 32-bit & 64-bit JDK 5.0u15revb09 bundles on an x86 machine with either Solaris 10u4 or Solaris 10u3 installed.
Bug can be reproduced for both 32-bit & 64-bit sun4u-sparc JDK 5.0u15revb09 bundles on a sun4u-sparc machine with Solaris 11 (Nevada) installed.
Bug can be reproduced with JDK 5.0 fcs sun4u-sparc bundles also.
Solaris 9 sun4u-sparc: Bug does not exist on either Gnome or CDE Desktops for both 32-bit & 64-bit sun4u-sparc JDK 5.0u15revb09 bundles on a sun4u-sparc machine with Solaris 9 installed.

Solaris 9 Bug x86: Bug does not exist on x86 arch machine. InternalFrameGenerator displays correctly on both Gnome & CDE Desktops using both 32-bit & 64-bit JDK 5.0u15revb09 bundles on an x86 machine with Solaris 9 installed.
Bug can be reproduced on 64-bit sun4u-sparc JDK 5.0u15-rev-b10v2.