Problem with text in dashboard after update to 4.1

Hi,
I updated our wordpress to 4.1 last week and since then we have problems with the font’s showing in the dashboard.
It seems that there are several hidden characters inserted in the title!
These texts were showing correctly before and they are still visible in a correct way in the site.
This is what you got in the dashboard

This is the correct show and how it should be

Any solutions?
Thanks in advanced.