Description:
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(I apologize for the lack of technical detail)

A simple form, submitting to the same page that the form is on, is seeing the "url" in the word "curl" and causing an error. Something is attempting to operate on the "url". 

It's a basic text field, and I'm not able to manipulate it with any PHP string commands to avoid the problem.

Reproduce code:
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print "<form method=\"post\" action=\"commentary.php\">";
print "<textarea name=\"actualText\" rows=\"10\" cols=\"70\"></textarea></td>";
print "<input type=\"submit\" value=\"Save\" />";
print "</form>";

(There's more code to the page, but the value of "curl" followed by a space "curl " causes the error and doesn't allow any other code to be run.

Expected result:
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Textfield value added to database, and a "success" message should be displayed.

Actual result:
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Forbidden
You don't have permission to access /admin/commentary.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/1.3.33 Server at www.progressivedailybeacon.com Port 80


(The script is in a passworded directory, that has already been logged into by this point.)