Running under Java 7 seems to work, but building under it causes core/runtime to die:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project switchyard-runtime: Compilation failure: Compilation failure:
[ERROR] bootstrap class path not set in conjunction with -source 1.6
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[232,18] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[232,34] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[234,55] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[234,25] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[236,55] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/validate/BaseValidatorRegistry.java:[236,25] error: _javaType has private access in JavaSourceFallbackValidator
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[296,18] error: _javaType has private access in JavaSourceFallbackTransformer
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[296,34] error: _javaType has private access in JavaSourceFallbackTransformer
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[298,55] error: _javaType has private access in JavaSourceFallbackTransformer
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[298,25] error: _javaType has private access in JavaSourceFallbackTransformer
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[300,55] error: _javaType has private access in JavaSourceFallbackTransformer
[ERROR] /Users/errantepiphany/Development/github/errantepiphany/switchyard-core/runtime/src/main/java/org/switchyard/internal/transform/BaseTransformerRegistry.java:[300,25] error: _javaType has private access in JavaSourceFallbackTransformer