bug summary: It failed automatically after push DONE button, due to the Applet thread threw exception.

Testsuite name: swing-reg
JDK/JRE tested: jdk-7-ea-bin-b110-windows-i586-16_sep_2010.exe
OS/architecture: x86
Reproducible: Always
Reproducible on machine: winxp-i586
Is it a platform specific regression: N
Is it a Regression: N
Test run log location: http://jsqalab.sfbay.sun.com/results/Evergreen/7/1.7.0b110/swing/winxppro-sp3-i586/
Steps to reproduce:
1. download ws(7_swing_reg.tar) & jct3.2 tool then unzip
2. install test jdk
3. modify argument file (reg_swing.sh) & testlist
4. use "ksh reg_swing.sh" command and then lunch the java test harness to run test cases.

instruction:
1.Go into 'subDir' folder.
2.Press BACKSPACE key.
3.Push OPEN button.
4.Push DONE button.

actual behavior:
It failed automatically after push DONE button.

Execution failed: Applet thread threw exception: java.lang.RuntimeException: BackSpace keyboard button does not lead to parent directory

verify:
None