The certificate for some Java applets in Lotus Domino 6.5x, 7.0.x, 8.0.x, and 8.5 expires on May 18, 2009. Re-signed applets are now available for download.
For instructions on downloading and applying the re-signed applets, see Technote #4022981 – Download re-signed Java applets for Lotus Domino (May 18, 2009) (http://www.ibm.com/support/docview.wss?rs=899&uid=swg24022981)
For background information, additional options for addressing the issue, and frequently asked questions and answers, see Technote #1381298 – Security certificate expiration messages generated from Domino applets (May 18, 2009) (http://www.ibm.com/support/docview.wss?uid=swg21381298)
Please note that Lotus Sametime applets are also affected. If you use Lotus Sametime 7.0, 7.5.1 CF1 or CF2, and 8.0.x, refer to Technote #1380778 – Sametime applets signer certificate expires on 18 May 2009 (http://www.ibm.com/support/docview.wss?rs=899&uid=swg21380778)