How to reproduce

1.) Install JRE 6u10

2.) Set the update schedule to daily

3.) Modify the URL (Checksum) value with non existing cheksum value in version XML file.

4.) Make the regitry entries for Update servlet URL and RUN at schedule

5.) Run the "jusched.exe"

Expected behaviour:
User shouldn't be notified with the Update dialog.

Actual behaviour:
User is notified with the Update dialog.
When Version XML file has no checksum Value (URLInfo is NULL or empty String), User should be notified with the Update Dialog. In this case even we don't need to verify the checksum.