customer is running an applet via a file url from a jar
file with a pathname that includes a space character.
when they open an input stream from a url made up of
the codebase (getDocumentBase()) & a filename, the URL's
openStream() method throws an AccessControlException.

this only happens with the 1.4.0 plugin - 1.3.1 was ok.

to test this, try running the applet at:

file:/net/kelvin.uk/export/dts/calls/417972/space dir/jdk14bug.htm