NullPointerException at sun.print.Win32PrintService.getMediaPrintables(Win32Prin

FULL PRODUCT VERSION :
java version " 1.7.0_25 "
Java(TM) SE Runtime Environment (build 1.7.0_25-b17)
Java HotSpot(TM) Client VM (build 23.25-b01, mixed mode, sharing)

Also occurs in

java version " 1.7.0_21 "
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) Client VM (build 23.21-b01, mixed mode, sharing)

java version " 1.7.0_15 "
Java(TM) SE Runtime Environment (build 1.7.0_15-b03)
Java HotSpot(TM) Client VM (build 23.7-b01, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601] 64bit

A DESCRIPTION OF THE PROBLEM :
java.lang.NullPointerException
 at sun.print.Win32PrintService.getMediaPrintables(Win32PrintService.java:431)
 at sun.print.Win32PrintService.getSupportedAttributeValues(Win32PrintService.java:1359)
 at sun.print.ServiceDialog$MarginsPanel.updateInfo(Unknown Source)

The (decompiled) code at that line:
    /* 431*/if( mediaSizeNames == null && mediaSizeNames.length == 0 )
      /* 432*/return null;

if mediaSizeNames == null then mediaSizeNames.length must throw that Exception


REPRODUCIBILITY :
This bug can be reproduced rarely.