When users switch to Arabic language on Internet Explorer (IE) they get a white page, although the source code is there. I tried this on IE6, IE8 and IE9 and they are all the same. This problem is not present on Chrome or Firefox.
This problem occurred after the upgrade from 2.1.2 to 2.1.3 (This week).
I have tried Farsi and Deutsch to see if there are any problems. Farsi has got this problem but Deutsch did not. So I think any right-left language will not be displayed right on IE.