After moving to version 1.7.0 of the aspectjtools it works fine. In addition you need to pass the compiler the version parameter as -1.7 (using the target parameter caused problems). If someone needs more details leave a comment and I'll add more configuration specific information. You can take a working example from here: Spring, AspectJ and Maven example
Here is the working plugin definition from the pom (compiler-version="1.7", aspectj.version="1.7.0")