Created attachment 8300 Photo showing the "sleep when inactive for" sliders, which read "55" and "One" rather than "55 minutes" and "One hour" The label on the slider used to set how long to wait before putting the system to sleep is cut off at a space. The sliders in the attached photo should read 55 minutes and One hour, yet they merely read 55 and One. I've tested changing the label for one hour to read "Onehour", and it displayed in full, but the minutes portion was still cut off.
Created attachment 8301 Image showing a modified xfce-power-manager-settings successfully displaying "Onehour" for the One hour label
Thanks for report and the investigation, but we are already tracking this on Bug #14395. I started to fix this, but time is lacking lately, so help is really wanted :) *** This bug has been marked as a duplicate of bug 14395 ***