There is a current issue with the JAVA Applets provided with IBM Lotus Domino (up to 7.0.1). These applets are digitally signed with a certificate which expired on 18 May 2006. In theory this should be no issue as the certificate was valid at the time being used to sign the code. The only impact should be
that the certificate could not be used any longer for signing.
In fact, several JRE's, including Sun JAVA 1.5.0 prompt the user with a certificate error prompt. IBM reacted by providing a fixpack that includes applets signed with a certificate valid till 2009. You can request this fixpack by opening a PMR with IBM Lotus Support. http://www.ibm.com/support/docview.wss?rs=463&uid=swg21238081