Clicking on my todo items causes Internal error

Reproduction path:

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Click on the item in the dashboards 'My todo list'

Then I get the following error:

11.12.2008 16:04:02 ERROR [org.apache.wicket.RequestCycle.logRuntimeException():1437] close tag not found for tag: <span class="reqreject_ico" wicket:id="rejectRequest-dialog">. Component: [MarkupContainer [Component id = rejectRequest-dialog]]
org.apache.wicket.markup.MarkupException: close tag not found for tag: <span class="reqreject_ico" wicket:id="rejectRequest-dialog">. Component: [MarkupContainer [Component id = rejectRequest-dialog]]
at org.apache.wicket.markup.html.panel.Panel.onComponentTagBody(Panel.java:121)
at org.apache.wicket.Component.renderComponent(Component.java:2480)