Sun Java Runtime Environment 6.0 Update 15

Sun Microsystems, Inc. released the fifteenth update for the sixth version of the development and execution of applications written in the Java language.
This is again a service release, which includes updated security certificates, and also fixes about ten errors ( more ). The full list of innovations is described in detail in this file .
You can download it on the official site. In addition, you can upgrade through the embedded system. This will save traffic, as only updated components will be downloaded.

UPG
For some reason, java.sun.com/javase/downloads/index.jsp removed version 15. Although the people have already managed to download:
Java Runtime Environment 6.0 Update 15 (15.9 MB, Windows 9x / 2000 / XP / 2003 / Vista x86)
Java Runtime Environment 6.0 Update 15 (16.7 MB, Windows XP / 2003 / Vista / x64)