Date range - apply date range not showing

In my new Piwik installation, when clicking the date range area, I can select day, week, month, year, date range. I can see the apply button before I make my choice, but when I choose day, week, month, year, the button disappears and nothing happens. Only after selecting date range, the apply button remains and can be clicked.

do you see the same behavior on http://demo.piwik.org ?

same behavior in other browsers?

Looks like it’s a browser problem.
Got the same behaviour when working with Chrome, even on demo.piwik.org. No problem at all when using Firefox.