ZipValidator that worked in 3.0.3 doesn't work in 4.0

[Matt Raible]

This worked in 3.0.3:

    <bean name="zipValidator"
class="org.apache.tapestry.valid.PatternValidator">
        <set name="patternString" value="\\d{5}(-\\d{4})?"/>
        <set name="required" value="true"/>
        <set name="patternNotMatchedMessage" value="message:errors.zip"/>
        <set name="clientScriptingEnabled" value="true"/>
    </bean>

But this doesn't work in 4.0:

Unable to read OGNL expression '<parsed OGNL expression>' of
[EMAIL PROTECTED]: Error initializing property
patternString of bean 'zipValidator' (of component signup): Unable to
parse OGNL expression '\\d{5}(-\\d{4})?': Malformed OGNL expression:
\\d{5}(-\\d{4})?

Any idea how to fix this?  How did the regular expression syntax change?

Thanks,

Matt

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