Unintended modifications of dateTime values while doing copy

In a process below, there is only copying of '2010-01-25T15:38:54.82Z' value, but it ends up with '2010-01-25T14:38:54.82Z' - one hour switch.

<variable name="dateTime1" type="xsd:dateTime"/>

<receive
name="start"
partnerLink="HelloXQueryPartnerLink"
portType="test:HelloXQueryPortType"
operation="HelloXQuery"
variable="myVar"
createInstance="yes"/>

<assign name="assign1">
<copy>
<from>xsd:dateTime('2010-01-25T15:38:54.82Z')</from>
<to>$dateTime1</to>
</copy>
<copy>
<bpws:from expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xquery1.0">
<![CDATA[
<test:test1 xmlns:test="http://test.org">
<test:test2/>
</test:test1>
]]>
</bpws:from>
<to variable="myVar" part="TestPart"/>
</copy>
</assign>
<assign>
<copy>
<from>$dateTime1</from>
<to xmlns:test="http://test.org">$myVar.TestPart//test:test2</to>
</copy>
</assign>
<reply name="end"
partnerLink="HelloXQueryPartnerLink"
portType="test:HelloXQueryPortType"
operation="HelloXQuery"
variable="myVar"/>

1.X:
responded 2010-01-25T14:38:54.082Z (one hour switch)

trunk:
returned NO_RESPONSE:

11:52:12,499 | ERROR | ODEServerImpl-1 | ASSIGN | pache.ode.bpel.rtrep.v2.ASSIGN 100 | Assignment Fault:

{http://docs.oasis-open.org/wsbpel/2.0/process/executable}

subLanguageExecutionFault,lineNo=62,faultExplanation=

{http://docs.oasis-open.org/wsbpel/2.0/process/executable}

subLanguageExecutionFault: Class org/w3c/dom/TypeInfo violates loader constraints