I'm experiencing an issue when attempting to save a Powerpoint 2010 file to our SharePoint 2013 farm. If a user opens the file in Edit mode, when saving the file Upload Center 2010 complains the upload failed, and PowerPoint 2010 displays a message "Upload Failed The server version of this file was updated by another author" and 2 buttons are displayed "Keep My Version" and "Keep Server Version". This is incorrect though, because I confirmed on the server end the changes have been made. If a user keeps hitting save, sometimes it won't fail during the upload.
If a user opens a file in Read Only mode, then clicks on the Edit button in Powerpoint 2010 and saves the changes, they are then prompted by the error "Refresh Required This file needs to be refreshed with updates. Click Save to refresh and retry uploading your changes." Once again this is incorrect, as the changes have already been made in SharePoint.
I've recreated this error on multiple workstations, have tried re-installing Upload Center 2010, and have tried complete repairs of Office 2010. The occur continues to persist. This only occurs with Powerpoint 2010 though, and none of the other Office 2010 products. I feel this is a bug in Upload Center 2010 with SharePoint 2013, because when I save from PowerPoint 2010 through a WebDAV connection over file explorer, it saves fine without any issue.
Has anyone run into this problem before? Below are some screenshots of the errors.
Here's the error when opening in Edit mode:
Here's the error when opening in Read Only mode, and then clicking on Edit in PowerPoint: