resource model with regex produces an NPE

It appears to not just be a regex.....

when I edit a job, I cannot predict these failures very well...

there is something wrong:

These nodes:

 <node name="pbqark1v" description="Rundeck server node" tags="pb,qa1" hostname="pbqark1v" osArch="amd64" osFamily="unix" osName="Linux" osVersion="2.6.18-274.7.1.el5" sudo-command-enabled="true" username="imageuser"/>
  <node name="pbqark2v"  description="Rundeck server node" tags="pb,qa2" hostname="pbqark2v" osArch="amd64" osFamily="unix" osName="Linux" osVersion="2.6.18-274.7.1.el5" sudo-command-enabled="true" username="imageuser"/>
  <node name="pbqark3v"  description="Rundeck server node" tags="pb,qa3" hostname="pbqark3v" osArch="amd64" osFamily="unix" osName="Linux" osVersion="2.6.18-274.7.1.el5" sudo-command-enabled="true" username="imageuser"/>

when I input a tag, "qa1" it appears to match and fail at the UI, if I enter a tag that does not match, say "qa9" the result succeeeds with NO NODES.