PowerPoint and SharePoint

When opening PowerPoint from SharePoint, all works great.  It asks if you want to check out (if that is your permissions) or just to read only.  However, if you do check it out, when saving / closing there is no prompt to check back into SharePoint like excel.  Is this normal or is there something I am missing?  I am having problems with people forgetting to check PowerPoint files in as they are so use to how excel prompts for a check in and they figure it does an auto check in.