Read Only Summary on plan

Hi
 We are using RTC 4.0.1 and we want to have few attributes non editable at presentation level in plan.
e.g. Summary in plan. We have automated summary which populates depending on some attributes automatically after save operation on WI. At work item presentation level on web summary is declared as read only in editor presentation. however we can still edit summary in plan view. This should not be possible.

We have declared summary as read only in plan preview editor presentation as well
<section id="com.ibm.team.apt.planPreview.default.section.summary">
                    <presentation attributeId="com.ibm.team.workitem.attribute.summary" kind="com.ibm.team.workitem.kind.smallhtml">
                        <property key="readonly" value="true"/>
                        <property key="labelVisible" value="true"/>
                    </presentation>
</section>
 but this doesn't work in both eclipse and web client. In eclipse if i right click and choose edit summary then i can change it and save it.
Is this defect or we are missing settings?