Description of problem:
Sampo Pankki, part of Danske Bank, is one of the biggest banks in Finland and uses Java for their online service at

https://verkkopankki.sampopankki.fi/

Initially when the applet is being started logs may contain complaints about missing commands like hdparm but once those are available there are two remaining issues of which the other might be an icedtea-web issue.

First, when opening the page and logging in with username/password test/test and selecting the "Always trust" checkbox for all the presented pop-ups one gets an exception which looks like an issue with the applet:


java version "1.7.0_b147-icedtea"
OpenJDK Runtime Environment (fedora-2.1.fc17.6-i386)
OpenJDK Client VM (build 22.0-b10, mixed mode)
eSecurekey (build JL410110) started.
eSecurekey (build JL410110) started.
/builddir/build/BUILD/icedtea-web-1.2/plugin/icedteanp/IcedTeaNPPlugin.cc:684: thread 0xaea02fa0: Error: Unknown plugin value requested.
CallBackFocus not found!
java.lang.ArrayIndexOutOfBoundsException: 3
        at sun.applet.GetMemberPluginCallRequest.parseReturn(GetMemberPluginCallRequest.java:53)
        at sun.applet.PluginStreamHandler.finishCallRequest(PluginStreamHandler.java:300)
        at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:224)
        at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:78)
eSecurekey (build JL410110) started.


However, when retrying with clean caches and the trusted certificates removed and never selecting the "Always trust" checkbox when logging in, a pop-up asking for permission is presented after entering username/password but the pop-up window is completely unresponsive and java process eats up all CPU. All what is printed to logs is:


eSecurekey (build JL410110) started.
eSecurekey (build JL410110) started.
/builddir/build/BUILD/icedtea-web-1.2/plugin/icedteanp/IcedTeaNPPlugin.cc:684: thread 0xb0b71f00: Error: Unknown plugin value requested.


OpenJDK/icedtea-web should not hang on any applet like this.

How reproducible:
Always.

Steps to Reproduce:
1. Clear icedtea-web caches and remove any trusted certificates for sampopankki.fi
2. Open https://verkkopankki.sampopankki.fi/ with Firefox
3. Allow everything to run but never select "Always trust" when doing so
4. Login with username/password test/test
5. Notice how a pop-up window presented is completely unresponsive and java process eats up all CPU