Documents Versioning

Documents Versioning

It seems there is a problem in uploading a new version of existing documents, it doesn't work !!!

I am trying to upload the new version since Thursday with no luck; here are the possible scenarios:
1- Upload specific document, try to upload a newer version of the document, it works flawlessly.
2- Upload specific document, move the document to a different folder, try to upload a newer version, doesn�t work, and show no errors.
3- Upload specific document, another user try to upload a newer version, doesn�t work, and show no errors.

Enjoy fixing!

Ziad