When you modify the PageTitle property of a new Page Definition to a label with a ‘special’ character in it. You will see that the title is not rendered well. For example when you use a é it will be rendered as é. I logged this case with Microsoft and for the moment there is no fix for this issue, but they suggested a simple workaround.
When you edit your page in Sharepoint, you can remove the ‘Dynamics Page Title Web Part’ and replace it by the old ‘Page Title Web Part’
The reason why there are two Web Parts is mainly the “Page Title Web Part” is the old Web Framework (Dynamics AX 4.0) – and rendering takes part in X++ code while “Dynamics Page Title Web Part” is implemented completely in C#.