I seem to have the same issue with both the stand-alone version and the web-start version. Here are the properties from the stand-alone version.
apple.laf.useScreenMenuBar=true
awt.toolkit=sun.awt.windows.WToolkit
com.apple.mrj.application.apple.menu.about.name=SoapUI
file.encoding=Cp1252
file.encoding.pkg=sun.io
file.separator=\
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.awt.printerjob=sun.awt.windows.WPrinterJob
java.class.path=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\soapui-2.5.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\activation-1.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\bcprov-jdk15-141.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\binding-2.0.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-beanutils-1.7.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-cli-1.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-codec-1.3.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-collections-3.2.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-httpclient-3.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-io-1.3.2.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-lang-2.4.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\commons-logging-1.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\ext-xmlbeans-1.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\ezmorph-1.0.5.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\forms-1.0.7.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\groovy-all-1.5.7.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\j2ee-xmlbeans-1.4.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\javamail-1.4.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\jetty-6.1.14.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\jetty-util-6.1.14.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\json-lib-2.2.2-jdk15.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\jsr173_1.0_api-xmlbeans-2.4.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\jtidy-8.0-SNAPSHOT.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\junit-4.4.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\l2fprod-common-fontchooser-0.2-dev.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\log4j-1.2.14.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\looks-2.2.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\not-yet-commons-ssl-0.3.10.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\opensaml-1.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\policy-xmlbeans-1.5.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\rsyntaxtextarea-1.0-soapui.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\saxon-9.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\saxon-dom-9.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\servlet-api-2.5-6.1.14.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\soap-xmlbeans-1.2.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\soapui-xmlbeans-2.5.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\swingx-soapui.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\wadl-xmlbeans-1.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\wsdl4j-1.6.2-fixed.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\wss4j-1.5.5.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xalan-2.7.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xbean-fixed-2.4.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xbean_xpath-2.4.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xercesImpl-2.9.1.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xmlpublic-2.4.0.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xmlsec-1.4.2.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xmlunit-1.2.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\..\lib\xom-1.1.jar;
java.class.version=50.0
java.endorsed.dirs=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\endorsed
java.ext.dirs=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
java.home=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre
java.io.tmpdir=C:\DOCUME~1\jstepan\LOCALS~1\Temp\
java.library.path=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;c:\oracle\product\11.1.0\client_1;c:\oracle\product\11.1.0\client_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Diskeeper Corporation\Diskeeper\;C:\Program Files\Hummingbird\Connectivity\10.00\Accessories\;;C:\Program Files\Rational\common;C:\Program Files\Rational\ClearCase\bin
java.runtime.name=Java(TM) SE Runtime Environment
java.runtime.version=1.6.0_10-b33
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.6
java.vendor=Sun Microsystems Inc.
java.vendor.url=http://java.sun.com/
java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi
java.version=1.6.0_10
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Sun Microsystems Inc.
java.vm.version=11.0-b15
line.separator=
os.arch=x86
os.name=Windows XP
os.version=5.1
path.separator=;
soapui.ext.actions=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\actions
soapui.ext.libraries=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\ext
soapui.ext.listeners=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\listeners
soapui.home=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin\
soapui.properties=soapui.properties
sun.arch.data.model=32
sun.boot.class.path=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\resources.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\rt.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\sunrsasign.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\jsse.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\jce.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\lib\charsets.jar;C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\classes
sun.boot.library.path=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\jre\bin
sun.cpu.endian=little
sun.cpu.isalist=
sun.desktop=windows
sun.io.unicode.encoding=UnicodeLittle
sun.java.launcher=SUN_STANDARD
sun.jnu.encoding=Cp1252
sun.management.compiler=HotSpot Client Compiler
sun.os.patch.level=Service Pack 2
user.country=CA
user.dir=C:\Documents and Settings\jstepan\My Documents\Tools\soapUI\soapui-2.5.1\bin
user.home=C:\Documents and Settings\jstepan
user.language=en
user.name=jstepan
user.timezone=America/Los_Angeles
user.variant=
