Method Invoke fails because all parameters seem to be wiped out

I just installed openwsman.2.1.0 and my SSL certs/keys failed to work. I noticed someone already had reported that issue and after following his directions I'm past it. However, now my Method call on ta CIM object fails. I traced the network traffic (turned off SSL for this) and noticed that the CIM-XML requestw generated had wiped out the method parameters. So a CIM-XML request that used to look like

<localinstancepath>..instance information.. </localinstancepath>
<paramvalue NAME="AffectedSystem" PARAMTYPE="string"><value>MyInstanceName</value></paramvalue>

now looks like

<localinstancepath>..instance information.. </localinstancepath>
<paramvalue NAME="AffectedSystem" PARAMTYPE="string"><value>.</value></paramvalue> 

The string is gone. Perhaps due to the use of unicode/utf-8 characters without using the proper encoding ?