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Struts (v1.1b3) html:errors property attribute?

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I'm having difficulty getting the 'property' element to work when the error(s) I'm trying to present are produced by global exceptions.
I have configured a couple of global-exception types that my business tier could throw and want to present the messages at the top of the form.
On the same form, I also am handling presentation validation and presenting the errors next to the related input field on the form using the 'property' attribute:
<html:input property="foo"/><html:errors property="foo"/>
I only want the errors produced by the global exceptions to appear at the top of the page.
If I simply use <html:errors/> at the top of the page, the property-specific errors are repeated there as well as next to the input fields.
I thought I understood that the errors produced by a global exception could be referenced by the ActionErrors.GLOBAL_PROPERTY property key.
However, the following produces no output:
<html:errors property="<%=ActionErrors.GLOBAL_ERROR"%>"/>
If I don't specify the 'property' attribute, the global ex errors are presented.
So, how should a global exception's ActionError's get referenced?
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