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Chrome and Plugins

April 17th, 2015 IMG Posted in Java, Panopto Comments Off on Chrome and Plugins

Thanks to Rusty for the headsup:

As of Chrome 42, Chrome no longer supports NPAPI plugins. This means that Java, Silverlight,  QuickTime, and a bunch of other plugins that use NPAPI won’t work out of the box (amusingly enough, the Google Earth plugin is also an NPAPI plugin). By Chrome 45, NPAPI support will be completely dropped and there won’t be any way to run them (unless you install IE frame or some extension like that I guess?).

Google stated that they’ve been doing this because NPAPI is responsible for browser instability and security problems. The alternatives they’ve suggested for developers are to use PPAPI (Chrome’s own plugin API), NaCl (Chrome’s extension system), or HTML5.

In the meantime, if you go to chrome://flags/#enable-npapi and click Enable NPAPI, then click the Relaunch button at the bottom of the page, plugins will temporarily work.

NPAPI is scheduled to be completely dropped by the end of September.

You can read more about the decision here:

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Respondus Lockdown Browser and Java 1.6.0_29 on Macs

November 28th, 2011 IMG Posted in Java, Respondus Comments Off on Respondus Lockdown Browser and Java 1.6.0_29 on Macs

Update: If you have a Mac computer, be sure to update to the latest Lockdown Browser as Respondus has issued a temporary fix until Java is fixed.

From Respondus:

An important issue has come up for Respondus LockDown Browser users who run Mac OSX with the latest release of Java (version 1.6.0_29).

The issue is that WebKit-based browsers running with Java 1.6.0_29 will crash if a Java applet is encountered. Respondus LockDown Browser relies on WebKit so it exhibits the same behavior. (Note that Chrome and other browsers based on WebKit exhibit the same problem, although Apple has modified its Safari browser to work around the issue.)

For Blackboard Learn customers, Java applets are encountered when an exam containing essay questions is started (the rich-text editor for essay questions uses Java applets). For Blackboard CE/Vista customers, a crash occurs at the login page since Java applets are used with the browser checker.

The developer community anticipates that either WebKit or Apple will resolve this issue in quick order. Unfortunately, at the moment, WebKit feels that Apple should fix the issue, while Apple feels that WebKit should provide the fix. In the meantime, however, we are doing two things:

1) We have issued a patch for the Mac edition of LockDown Browser. Once the update is applied, LockDown Browser will detect, upon startup, whether a user is running Java 1.6.0_29. If this combination is found, they will receive this message:


WARNING: Java version 1.6.0_29 detected.

This version of Java is known to be incompatible with your learning system and may cause this browser application to crash.

We recommend that you do NOT continue. As a work-around, you may consider using a different computer.

[Quit]  [Continue]


IMPORTANT: In order for users to be aware of this update, the institution’s Administrator for LockDown Browser should login to the admin area ( and select “yes” for the setting “Check for newer version of LockDown Browser” (the default setting is “no”). This will enable Mac users to receive a notice each time they start LockDown Browser that an update is available.

2) Simultaneously, we are working on a solution where our own version of WebKit will be embedded with each installation of the Mac LockDown Browser software. This will require substantial QA testing and our hope is that the issue will be resolved by WebKit or Apple before we have to resort to distributing our own WebKit.  However, given no official response on timing of the solution from either WebKit or Apple, we feel this is a prudent path to pursue.

We hope this information is helpful. If you have questions about this issue, please don’t hesitate to open a support ticket at

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Chat Room Issues after Java Update (1.6.0_29)

October 26th, 2011 IMG Posted in Java Comments Off on Chat Room Issues after Java Update (1.6.0_29)

The latest Java update – 1.6.0_29 – is NOT supported by Blackboard; the Blackboard Chat tool will not work with this version of Java. If you try to open a Chat Room and get a message saying “Session has expired. Close the program and log in again” delete Java and install an earlier version. Java 1.6.0_26 is recommended.

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Java Issue with Blackboard (Java 1.6.0_19)

April 1st, 2010 IMG Posted in Java Comments Off on Java Issue with Blackboard (Java 1.6.0_19)

Java version 1.6.0_19 was released yesterday. Oracle/Sun has introduced a new practice with this release where users will be presented with a warning dialog when a program they are using contains both signed and unsigned components.

Details are available here:

The warning states “Java has discovered application components that could indicate a security concern”. Users are asked if they wish to block potentially unsafe components from being run. If they click Yes (which is recommended on the warning and is the default selection), the Java components will not work.

Blackboard users who have upgraded to Java 1.6.0_19 are presented with this warning when they login to Blackboard, when they enable the HTML Creator, when they use the Chat tool, or when they access the My Computer applet. If they click Yes, the tool will not run. They must click “No” to use that Java tool in Blackboard.

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