We have updated the planner to support UTF-8 encoding properly. This appears to have been broken since we added a display tag filter to our filter chain a few months ago. Our customers using Arabic characters reported that their display characters were not being preserved correctly, and thus the need for this update.
With the release from today, this appears to be fixed. Yet, if you have any display issues with your localized language, please let us know by sending email to firstname.lastname@example.org.