This behavior is reproducable with SuSE 10 and on Ubuntu 6.06. This is observed with java 6 and 7
I have two Frames F1, F2 and a child Dialog of F1 visible on screen. Calling toBack on the Dialog does not push the dialog to the back of F2. Dialog still stays above F2.
1. Run the attached testcase which shows two Frames
2. Click on the button 'Show Dialog', which will show the Dialog
3. Click on 'Dialog Toback' button on the Dialog
If clicking the button does not move the Dialog to the back of F2, bug is reproduced.