Services, shell scripts and errors

Unix question here:
I am playing around with the new services feature of SL. Great stuff. Generally I am writing little one line scripts to do minor operations (like touch, for example). However, when there is an error in the script, the service craps out with an error dialog. I'd like to ignore the error & continue on. I've tried redirecting stderr to /dev/null, but it doesn't seem to work. Here is an example of a script that will fail the second time it is run over a set of files:
for i in *; do xattr -d com.apple.quarantine "$i"; done
Does anyone know of a way to get the service system to ignore any errors that the script may encounter?

the standard unix way works for me. I'm not sure what problems you guys are having.
<pre style="
font-family: Monaco, 'Courier New', Courier, monospace;
font-size: 10px;
margin: 0px;
padding: 5px;
border: 1px solid #000000;
width: 720px;
color: #000000;
background-color: #ADD8E6;
overflow: auto;"
title="this text can be pasted into the Script Editor">
for f in "$@"
do
xattr -d com.apple.quarantine "$f" >/dev/null 2>&1 &
done</pre>

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