We had an interesting issue that we identified. If a customer has a deployment of AGPM 3.0 and the AGPM client connecting to the server is in a different language, (lets say Portuguese) than the server installation (which might be in US English), displaying the settings reports of the the GPO's doesnt show the correct language. It shows English information.
This is because in AGPM, reporting is generated from the server side not the client. The fix is actually pretty easy. Make sure that the ADML files are installed correctly on the server side for all languages that need to be supported by the server. This can be simple file copy or actually installing the correct locale to support this.
Let me know if you run into this issue and need help :)