IDEA 12.1.2, seeing this error fairly frequently since the latest update whenever I try to build:
java: cannot access <class name>
bad class file: /Users/cbeust/<class name>.class
bad signature: ¾2 3
Please remove or make sure it appears in the correct subdirectory of the classpath.
The only way to fix it is to run `mvn clean package` in the shell and build again with IDEA.