[FX.php List] "degrees" symbol

[Alex Gates]

Greetings-

I'm doing a string replace to replace the word "degrees" with the
degrees symbol "°".
I'm using this code for the string replace:

$instructions = trim($_POST['instructions']);
$instructions2 = str_replace("degrees", "°", $instructions);


It works fine in the PHP and displays correctly on my "please verify"
page - but when I try to submit this to FileMaker I get:
Error 958 - Parameter missing in query.

I only get this error if I happen to use the word "degrees."  It works
fine if I don't.

My charset is: iso-8859-1

Any ideas?

Alex P. Gates