"Your Changes were saved but could not be uploaded because of an error. You may be able to upload this file using the server web page."

When you are using Office 2010 with Sharepoint 2010, I recently noticed one of the users in our environment got this error message. The user was trying to make changes to a document in a Sharepoint document library and trying to save it

"Your Changes were saved but could not be uploaded because of an error. You may be able to upload this file using the server web page."

The error was due to documents getting upload by Microsoft Office Upload Center. Microsoft Upload Center is and add-on that gets install with Office 2010 suite. This probably is saving document to its drafts and not letting it upload the changes.

To fix this, what worked for me was to :

1) Check-Out the document you wish to edit.

2) You will be prompt for saving it to your local drafts.

3) Enable it (check that box) and click OK

4) Now edit the document and save it.

5) You will be asked to check in your changes

6) Put in the comments and click OK

Alternatively , I read somewhere, to disable the Microsoft Office Upload Center and try saving your document.

Open task manager and kill MSOSYNC.EXE and OSPPSVC.EXE