There seems to be a copy-paste mistake in the OMMojo.java file (I also just posted this to the user mailinglist).
At the getMojoContextProperties() Method the configuration-property of ENABLE_JAVA_5_FEATURES_CONTEXT_PROPERTY is set to the value of correctGetters, which is wrong and should be set to enableJava5Features.
I changed it the following way:
|Field||Original Value||New Value|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Fix Version/s||3.3-RC3 [ 12312398 ]|
|Resolution||Duplicate [ 3 ]|
|Status||Resolved [ 5 ]||Closed [ 6 ]|