Writing Arabic in InDesign cs5 has not been a problem ever before, but today it started to annoy me, as I didn't do anything different than I usually do and didn't touch any settings, etc. Kerning is as it was before and has always been on 'zero'.
Even the letters that are joined (blue highlighted) - the attached picture are separating from one another!
I have InDesign CS5 for PC. It is not a Middle Eastern version.