The Solaris 10 10/09 has been tested for compatibility with previous releases in line with Solaris's compatibility guarantee. This means that applications, including third party applications, which adhere to Solaris's published ABI will work without modification on the Solaris 10 10/09 release. For more information, see the Solaris Application Guarantee Program at http://www.sun.com/software/solaris/guarantee.jsp.
Your system might run both a Solaris OS and other products that are not part of the Solaris software. These products might be supplied by either Sun or another company. If you upgrade this system to the Solaris 10 release, make sure that these other products are also supported on the Solaris 10 OS. Depending on the status of each of these products, you can perform one of the following options:
Verify that the existing version of the product is supported on the Solaris 10 software.
Install a new version of the product that is supported on the Solaris 10 release. You might need to remove the previous version of the product prior to upgrading to the Solaris software. See the product documentation for more details.
Remove the product prior to upgrading to the Solaris 10 software.