What is JAR cache and why might I need to clear it?
Blackboard makes heavy use of JAR files. Java code for applets is stored in Java Archive or JAR files. When you use a JAR file, it is saved on your hard drive in your JAR cache so it does not need to be fetched from the server if it is needed again. This is done so your application will start up much faster. Like browser cache, your JAR cache can become corrupted. Clearing it will force the browser to go out to the server to download the JAR file before launching the application.
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