After upgrading to 1.4, none of my build configurations functioned. Each of them failed with an NPE in the same location:

[Package_CM_1_2] $ /usr/bin/xcodebuild -version
Xcode 5.0
Build version 5A1412
Fetching marketing version number (CFBundleShortVersionString) from project.
[Package_CM_1_2] $ /usr/bin/agvtool mvers -terse1
No marketing version found (CFBundleShortVersionString).
Marketing version (CFBundleShortVersionString) found in project configuration: .
Fetching technical version number (CFBundleVersion) from project.
[Package_CM_1_2] $ /usr/bin/agvtool vers -terse
No marketing version found (CFBundleVersion)
Technical version (CFBundleVersion) found in project configuration: .
Marketing version (CFBundleShortVersionString) used by Jenkins to produce the IPA:
Technical version (CFBundleVersion) used by Jenkins to produce the IPA:
Cleaning build directory: /Development/Jenkins/workspace/Package_CM_1_2/build/Release-iphoneos
[Package_CM_1_2] $ /usr/bin/security list-keychains -s /Users/buildbot/Library/Keychains/BuildBotCodeSigner.keychain
[Package_CM_1_2] $ /usr/bin/security default-keychain -d user -s /Users/buildbot/Library/Keychains/BuildBotCodeSigner.keychain
[Package_CM_1_2] $ /usr/bin/security unlock-keychain -p ******** /Users/buildbot/Library/Keychains/BuildBotCodeSigner.keychain
[Package_CM_1_2] $ /usr/bin/security show-keychain-info /Users/buildbot/Library/Keychains/BuildBotCodeSigner.keychain
Keychain "/Users/buildbot/Library/Keychains/BuildBotCodeSigner.keychain" lock-on-sleep timeout=300s
===========================================================
== Available provisioning profiles
[Package_CM_1_2] $ /usr/bin/security find-identity -p codesigning -v
1) ***** "****"
2) ***** "****"
3) ***** "****"
3 valid identities found
== Available SDKs
[Package_CM_1_2] $ /usr/bin/xcodebuild -showsdks
OS X SDKs:
OS X 10.8 -sdk macosx10.8

iOS SDKs:
iOS 7.0 -sdk iphoneos7.0

iOS Simulator SDKs:
Simulator - iOS 6.1 -sdk iphonesimulator6.1
Simulator - iOS 7.0 -sdk iphonesimulator7.0

== Available schemes
[Package_CM_1_2] $ /usr/bin/xcodebuild -list
Information about project "CartographicaMobile":
Targets:
CartographicaMobile
CartoMobileTests

Build Configurations:
Debug
Coverage
Release
Distribution

If no build configuration is specified and -scheme is not passed then "Release" is used.

Schemes:
CartoMobile
CartoMobile-Distribution
CartoMobileUnitTests
===========================================================
FATAL: null
java.lang.NullPointerException
at au.com.rayh.XCodeBuilder.perform(XCodeBuilder.java:489)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:567)
at hudson.model.Run.execute(Run.java:1665)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:246)