My modelines don't work for me any more

I used to be able to set a bunch of options with modelines. Something
has changed.

For example, I put this line at the bottom of a bash script:
# vim: et sr ai nocp:sts=2 sw=2 ts=8
but I find my shiftwidth is still 8. Changing spaces to colons does not help.

The format I'm using agrees with the :help modeline format. But no joy.

What am I doing wrong?

--
Kevin O'Gorman

programmer, n. an organism that transmutes caffeine into software.
Please consider the environment before printing this email.

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