ParseException in jcp.trace file

Tested OS : windows XP
Tested build : 6u10 b32

steps to reproduce:
1. install jre
2. launch java control panel
3. enable tracing and close java control panel
4. launch any java web start appln
5. launch java control panel again

check the jcp.trace file in <user_profile>/sun/java/deployment/log directory. the content shows the following :
got exception: java.text.ParseException: Unparseable date: ""

note : jcp.trace file attached