Groovy Console applet only works under Windows

For a little while now I've been running a Groovy Console in an applet as a way of letting people try a 'live demo' of my Open Source project (before they go to the trouble of downloading it). The demo is here:

http://metawidget.org/live-demo

It uses a (slightly modified) Groovy Console in an applet. You can see the slight modifications here:

http://metawidget.svn.sourceforge.net/viewvc/metawidget/trunk/examples/src/java/org/metawidget/example/swing/console/GroovyConsoleApplet.java?revision=371&view=markup

By all accounts this demo works well on Windows. It takes a little while to download but other than that it's great.

However I have received multiple complaints about its performance on Ubuntu and Fedora. Using the Sun JVM plugin it runs extremely slowly ('laggy', as
in menus slow to open), takes a long time to execute the Groovy script, and is generally unusable. Other applets on the same platform work okay. Similarly, I have received complaints on Mac OS. See this thread...

http://groups.google.com/group/groovy-user/browse_thread/thread/fa1b9762bc41755c/715bb641e721c5aa?hl=en&ie=UTF-8&oe=UTF-8&q=metawidget

Could these issues be resolved, or is it not advisable to try and run the Groovy Console in an applet? The 'user experience' needs to be better before this JIRA...

http://jira.codehaus.org/browse/GROOVY-3096

...can become a reality.

Regards,

Richard.