The 'Restore' icon on the top-right corner of a maximized internal frame is only partially rendered on OpenGL since JDK7-b08 on SolSparc10-XVR600. To reproduce, do the following -

1. Run SwinSet2 with OpenGL turned on.
2. Choose GTK Look And Feel
3. Go to the first tab. Maximize one of the JInternalFrames.
4. Once maximized, watch the 'Restore' button which is located in-between 'minimize' and 'close'.

You will notice that the bottom portion of the rectangle is not drawn properly.

This is not reproducible on the same machine with JDK7-b07 but reproducible with b08. Not reproducible in default mode. Not reproducible on other look & feels and platforms.

I reproduced it on SunBlade-2500-SolSparc10-XVR-600-Sun OpenGL 1.5 (patch 120812-18).

I have attached a screenshot of the same.