I just started working with Khmer text in InDesign CS 5.5, and in order to use a Khmer hunspell dictionary for spelling I placed a hair space between words and applied a grep style of 1% horizontal width (because Khmer does not use spaces between words and InDesign doesn't think a zero-width space separates words like we normally do for Khmer). Now I've run into a problem - it seems hair spaces do not allow for line breaks when using justified paragraph styles.
Can anyone confirm that hair spaces do not allow for a line break? And any suggestions on how to fix this issue?
I believe that all of the fixed-width spaces are non-breaking.