I'm using some hungarian characters in the host names and after loading a v7 backup I've realized that in v8 the character "á" changed to "á". If I correct it manually, the Network tab shows the correct character but at any other location it remains the same.
Can you please provide a screenshot of the network object, and of it's changelog? You can get to the changelog by navigating to that object under Definitions>>Networks, then clicking on the blue info-symbol (i) on the right, and then on "Open changelog".
