(bill.foote@Eng 1997-03-02: Reclassified under java.classes_util, even though
 this is a sun.applet bug. What _is_ the right category of a sun.applet
 bug?)

  Sometimes applets on a page will disappear if the browser
window is cloned and the user 'backs' to the page with the applet.

Here are the steps to reproduce this using the attached applets
and test html. The two applets (testApplet1 and testApplet2)
simply paint some text. The two html files have an applet and
a link to the other html page. So first save the attachments
in some directory.

1. Open test1.html.
The page should have "Test Applet 1" applet text.

2. Click on "Click here".
This will take you to the test2.html page.
The page should have "Test Applet 2" applet text.

3. Shift-Click on the Back button to create a new browser window
with test1.html page.

4. Close the new browser window.
Note the "Interrupted: bailing" message in the original
browser windows message line.

5. Click on the "Go back" link to go to first page.
The page should have "Test Applet 1" applet text but doesn't!
Clicking on Reload brings the applet back.

This is reproducible with hotjava1.0j and JDK1.1.1A as
well as a current build of hotjava (again on JDK1.1.1).

I tracked down the "Interrupted: bailing" message to the
sun.applet.AppletPanel.run() method. If it cannot get
the next event, it returns. This method handles the various
APPLET_* events (e.g. APPLET_LOAD, APPLET_START, APPLET_STOP).
I'm guessing that one of these events was coming in (perhaps
APPLET_STOP?) and was not fully handled. This may have left
the applet in an indeterminate state so that when it is activated
again it fails to paint properly.

This test case may seem somewhat odd but it was created by
distilling the Genie stuff down. They found that their applets
were not always functioning if the users went back and forth
in various ways. For what its worth, this test case work
fine in Netscape.