Scheduling issues via drag&drop in Planning Board requires Edit permission in addition to Schedule permission

2011-11-21 15:45:33,871 http-8081-1 ERROR valerie.pierre 945x58x1 m4az45 80.12.85.31,127.0.0.1 /secure/Update.jspa [webwork.util.ValueStack] query="issue" {[id="issue" type="8" values=""]}
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at webwork.util.InjectionUtils$DefaultInjectionImpl.invoke(InjectionUtils.java:70)
        at webwork.util.InjectionUtils.invoke(InjectionUtils.java:56)
        at webwork.util.ValueStack.findValue(ValueStack.java:414)
        at webwork.util.ValueStack.findValue(ValueStack.java:213)
        at webwork.view.velocity.VelocityHelper$WebWorkVelocityContext.internalGet(VelocityHelper.java:237)
        at org.apache.velocity.context.AbstractContext.get(AbstractContext.java:200)
        at org.apache.velocity.context.InternalContextAdapterImpl.get(InternalContextAdapterImpl.java:162)
        at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:159)
        at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:114)
        at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55)
        at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:70)
[...]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:554)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:662)
Caused by: com.atlassian.jira.exception.IssueNotFoundException: Issue with id 'null' or key 'null' could not be found in the system
        at com.pyxis.greenhopper.jira.actions.AbstractIssueSelectAction.getIssue(AbstractIssueSelectAction.java:130)
        ... 179 more