Editing an in-thread comment

I have tried a couple of times, yesterday and today, to change something I have written in an in-thread comment.  I cannot get it to work.  I hit 'Edit', make my correction, and then find there is no button for confirming the correction.  The available buttons are 'Edit' (which does nothing if you hit it again) and 'Cancel'.  Can ChinesePod staff look at this?