Get Content Behaivior

If I add some movies as .iso files to storage directly attached to my WD TV Live SMP, even with the device in standby mode, the coresponding content info .xml and .metathumb files are downloaded within a very short period of time automatically.

However, if I add movies as .mp4 files, the content info .xml and .metathumb files are never automatucally downloaded. I have to do that manually on a movie by movie basis. Why is this?

Hello, what firmware version do you have? 

The latest, 2.01.86.