I originally raised this issue as part of bug 4782476, but at the request of
Steve Katz I am raising this issue as a separate bug:

Using the 1.4.1 plug-in, we were investigating bug 4782476 when a colleague
found another focus problem that is only seen with the Mozilla browser on
a Windows platform.

The problem is that the TAB key does not switch focus between fields within an
applet, but this feature does work on the Solaris version of Mozilla.

I believe that Mozilla is the only browser affected, but all versions, although
the problem was reported against version 1.2 of Mozilla.

To recreate: access a simple applet with, for example, a TexField and a ComboBox
then give the TextField focus. On Solaris you can TAB between the TextField and
ComboBox, but this feature does not work on Windows.

You can probably illustrate this using most applets but some examples can be
found at http://csis.pace.edu/~bergin/Java/applets.htm