OGL + XAWT: FileDialog drop-down is not properly painted when navigating thro' sub dirs

I am showing a frame that has 2 buttons. Click on one of the buttons. A file dialog will open up. View the drop-down once. Now I am selecting some folders from left-side list till I reach a folder that does not have any sub-folders. The path selected is relatively long with atleast 10 folders in it from the root. Now when I click on the drop-down button (next to 'Enter path or folder name' field), a drop-down appears. But the contents in the drop-down are not painted at the right location and they are shifted down towards the left side within the drop-down. So all the items are truncated and I could not make out anything from what is shown there.

This is reproducible only on XAWT with OpenGL pipleline and not reproducible with Win32. I reproduced it on SolarisSparc10-JDS (SunBlade2500) with XVR-600 frame buffer installed with Sun OGL libraries. I reproduced it with Mustang-b51 and not reproducible on earlier builds because of a deadlock bug in OGL+XAWT code that prevented file dialog from coming up properly (which got fixed b51).

I have attached a sample test to this bug report.