Frame opening fails to restore location

When running Sun's Forte for Java Community Edition (http://www.netbeans.com/ffj/community/) I've noticed the following broken behaviour:
1. Fire it up (see /home/jag/NetBeans/forte4j.sh) and get it to start up a
   few sub windows (it does this normally)
2. Minimize the main window
   - you should see all the other windows minimize as well.
3. Open up the main window again
   - you should see all the other windows open as well
   - then all the newly opened windows move to the upper left
     corner of the screen (0,0)
   **this is broken**

This does not happen in builds up to L
(/java/jdk/1.3/promoted/FCS/L/binary/solaris)
the windows stay in their correct location.

From build M on (the most recent I've tested is S)
the behavior is broken and the windows get
zapped to (0,0)