Apple this week pushed an update for Leopard and Snow Leopard systems that plugs a large number of security holes in Apple’s version of Java, a package installed by default on those Mac OS X systems that enables a number of multimedia Web applications. The new Java version fixes at least 14 vulnerabilities in the version designed for OS X 10.6 systems; the package put together for 10.5 Macs corrects more than two dozen security flaws. Mac users can grab the patches via Software Update or from Apple Downloads. The patch fun continues into Tuesday of next week, when both Microsoft and Adobe are scheduled to issue updates to plug security vulnerabilities of their own. Microsoft said Thursday that it plans to issue at least six security patches (each patch fixes at least one — but often multiple — security flaws). Half of those updates will carry a “critical” rating,