There is a rise in complaints, where consumers are getting error 1722 during installation. The is applies to all Java versions, all supported windows platforms, all supported broesers. Log files are attached, more log files can be provided upon request.
Some comments from consumers:

1) Please can you tell me how to correct error 1722?
I have attached the log files that your help site said to send you (there are 3 MSI files as I tried the install 3 times), plus I can tell you that I got the following warning then error windows during the "Apply Java Patches" stage of the install process:
Warning: bin\awt.dll: Old File not found. However, a file of the same name was found. No update since file contents do not match. OK.
Error: Java (TM) Update fails to apply changes to your system. OK.
I haven't tried the offline installation as suggested on your help website, but if you think it would work given the above error messages, let me know.
This is the first time I have ever experienced an error during an automatic Java update. I am on Windows XP by the way.

2) Error 1722.There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action patchjre, location: C:\Program Files\Java\jre6\patchjre.exe, command: -s "C:\Program Files\Java\jre6"