grid popup editor numeric text box ignores culture

[Just]

I have a grid with a pop-up editor that contains a date picker control and numeric text-box. On page load I change the kendo culture 

kendo.culture("de-DE");

All data shows up correctly on the grid. Now when I click on "Edit", the popup shows up with the right date. But the value in the numeric text-box is not correctly displayed. It shows a "." instead of ",".  (grid1.png)
 
And also when I change the values form 3.7 to 3.8; the numeric text box shows it as 38 instead of 3.8 (grid2.png)

Any ideas how this should be tackled?
Thanks.

[Just]

Figured out. I just had the input box specified as data-type="number" but did not have the 

data-role="numerictextbox" specified. Adding that fixed the issue.