FULL PRODUCT VERSION :
Java Plug-in 10.0.0.08
Using JRE version 1.7.0_06-ea-b08 Java HotSpot(TM) 64-Bit Server VM

ADDITIONAL OS VERSION INFORMATION :
Mac OS X 10.7.4

A DESCRIPTION OF THE PROBLEM :
When opening the Java Control Panel a software update notice automatically appears stating "Java Applet Plug-in 10.0.0.09 is available--you have 10.0.0. Would you like to download it now?"

When you click "Install Update" the software downloads, but when the download is complete and error message appears: "Update Error! The update is improperly signed." The only option is a "Cancel update" button.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to install the autoupdate.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The update should have installed.
ACTUAL -
Aborted installation.

REPRODUCIBILITY :
This bug can be reproduced always.