If I add a custom xcode config parameter such as SELECTED_LOCALE=en and click save, the custom parameter is not persisted. When I edit the project config again the parameter isnt there.

My config.xml file has the following entry for the XCode plugin:

<builders>
<au.com.rayh.XCodeBuilder>
<cleanBeforeBuild>true</cleanBeforeBuild>
<cleanTestReports>false</cleanTestReports>
<configuration>In-House</configuration>
<target>NTC</target>
<sdk></sdk>
<symRoot></symRoot>
<configurationBuildDir>${WORKSPACE}/build/In-House-iphoneos</configurationBuildDir>
<xcodeProjectPath></xcodeProjectPath>
<xcodeProjectFile></xcodeProjectFile>
<xcodebuildArguments>SELECTED_LOCALE=${LOCALE}</xcodebuildArguments>
<xcodeSchema>In-House</xcodeSchema>
<xcodeWorkspaceFile></xcodeWorkspaceFile>
<embeddedProfileFile></embeddedProfileFile>
<cfBundleVersionValue>2.6</cfBundleVersionValue>
<cfBundleShortVersionStringValue>2.6</cfBundleShortVersionStringValue>
<buildIpa>true</buildIpa>
<unlockKeychain>false</unlockKeychain>
<keychainPath>${HOME}/Library/Keychains/login.keychain</keychainPath>
<keychainPwd></keychainPwd>
</au.com.rayh.XCodeBuilder>
</builders>