Title says it all. The install process appears to go fine, but the JTablet Test Applet invariably says "plugin v.:couldn't load" and "JTablet class not found - Did you install JTabletSetup.exe?"
I've tried it with both the latest versions of IE and FireFox, both to no avail. Uninstalling and reinstalling does nothing, nor does restarting the browser or even the computer itself. Any ideas?

Try installing the latest vesrion of java, then installing jtablet again, then rebooting and trying it in firefox.
Also make sure you have the latest driver for your tablet installed (if it's a Wacom, go to www.wacom.com).

Aha! Updating the tablet driver was the one thing I hadn't done. Never thought that would stop the plugin from loading. Thanks very much for the assist.