It seems java applet error, here is the java console report (Slamd64 12.2, Firefox 3.5.2, java 1.6.20):
Java Plug-in 1.6.0_20
Using JRE version 1.6.0_20-b02 Java HotSpot(TM) 64-Bit Server VM
User home directory = /home/laci
----------------------------------------------------
java.lang.SecurityException: trusted loader attempted to load sandboxed resource from http://www.ebi.ac.uk/nmrshiftdb/nmrshiftdbhtml/spectrumapplet.jar
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.check(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.access$1400(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ChildElement.checkResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.checkResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.SecurityException: trusted loader attempted to load sandboxed resource from http://www.ebi.ac.uk/nmrshiftdb/nmrshiftdbhtml/spectrumapplet.jar
java.lang.SecurityException: trusted loader attempted to load sandboxed resource from http://www.ebi.ac.uk/nmrshiftdb/nmrshiftdbhtml/spectrumapplet.jar
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.check(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.access$1400(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ChildElement.checkResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.checkResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.SecurityException: trusted loader attempted to load sandboxed resource from http://www.ebi.ac.uk/nmrshiftdb/nmrshiftdbhtml/spectrumapplet.jar
screenshot