Is anyone else seeing this behavior? I am setting justified text that includes discretionary line breaks, and when the line break falls in a particularly loose line, InDesign adds space at the line break. I'm seeing the behavior in both CS5.5ME and CS6. I've tried a couple different fonts, but it always seem to be there.
In case it's useful to anyone, I finally figured this out. The problem is with the World-Ready Composer. When I change the composer to "Adobe Paragraph Composer," the problem goes away.