Java problems since 10.4.7 update

Hi,

since I updated to 10.4.7 I cannot run www.europoker.net anymore. Both Seamonkey aand Safari do not open the Java windows. The console.log shows this message at startup time of the computer (this is on startup, NOT when launching the browser or trying to play Poker!):

java.lang.SecurityException: illegal URL redirect
at sun.plugin.net.protocol.http.HttpUtils.followRedirects(HttpUtils.java:63)
at sun.plugin.cache.CachedJarLoader.download(CachedJarLoader.java:391)
at sun.plugin.cache.CachedJarLoader.load(CachedJarLoader.java:155)
at sun.plugin.cache.JarCache.get(JarCache.java:185)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(CachedJarURLConnecti on.java:94)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(CachedJarURLConne ction.java:78)
at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:583)
at sun.misc.URLClassPath$JarLoader.<init>(URLClassPath.java:546)
at sun.misc.URLClassPath$3.run(URLClassPath.java:324)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:313)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:290)
at sun.misc.URLClassPath.getResource(URLClassPath.java:160)
at java.net.URLClassLoader$1.run(URLClassLoader.java:192)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:147)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:119)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:591)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:721)
at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1807)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:650)
at sun.applet.AppletPanel.run(AppletPanel.java:324)
at java.lang.Thread.run(Thread.java:613)

Any ideas how to solve this? Thanks in advance!