JDBC Teststep broken in 3.5 Final

I get the following error when clicking on the TestConnection button: Can't get the connection for specified properties; java.lang.NullPointerException. There are no errors in any of the log files but if I click on the submit button (ie run query) then I get the following in the error log:

Wed Mar 17 16:32:45 NZDT 2010:ERROR:java.lang.NullPointerException
  java.lang.NullPointerException
  at com.eviware.soapui.impl.wsdl.panels.teststeps.JdbcSubmit.getDatabaseConnection(JdbcSubmit.java:237)
  at com.eviware.soapui.impl.wsdl.panels.teststeps.JdbcSubmit.prepare(JdbcSubmit.java:308)
  at com.eviware.soapui.impl.wsdl.panels.teststeps.JdbcSubmit.runQuery(JdbcSubmit.java:197)
  at com.eviware.soapui.impl.wsdl.panels.teststeps.JdbcSubmit.run(JdbcSubmit.java:162)
  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
  at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)

My driver is: com.informix.jdbc.IfxDriver
ConnectionString: jdbc:informix-sqli://wuasd103.:1540/res_dev1:INFORMIXSERVER=asd2_devdata;user=;password=

Note: domain, user & password remove for security reasons.

SQL Query: select html_receipt from sample_history where sample_history_id=2445;

This works with 3.5 Beta-2.

I notice that the source code for JdbcSubmit.java is quite different compared with beta-2.

Regards
Robert