jstl x:parse outputs data

My problem: x:parse is outputting the RSS feed content even though the JSP does 
not contain <x:out> or <c:out> statement

The code:

<c:import var="rssFeed" url="http://www.expasy.org/spotlight/index.xml"/>
<x:parse var="rss" xml="${rssFeed}"/>

output:

http://www.expasy.org/spotlight/ one month, one protein en-us 
[email protected] 2007-03-26T10:13:59+01:00 hourly 1 
2000-01-01T12:00+00:00
etc...

until:

while obestatin reports adequacy. 494@http://www.expasy.org/spotlight/ Article 
2006-01-19T13:22:59+01:00 " var="rss"/>


It looks as if part of the x:parse tag is printed on the HTML page!

I am using JSTL 1.1

Anybody seen this before?

-- 
Isabelle Phan, D.Phil.
Swiss Institute of Bioinformatics         Tel: (+41 22) 379 51 89
CMU - 1, rue Michel Servet                Fax: (+41 22) 379 58 58
CH - 1211 Geneva 4 Switzerland            email: [email protected]