My University requires students to add the mention "All rights reserved." on their thesis. The full required copyright notice is "© 2008 Jane Doe. All rights reserved."
However, I have read in a couple of places that the mention "All rights reserved" has no legal significance:
The phrase was a required element in the 1910 Buenos Aires Copyright Convention. This was a treaty between the United States and most South and Middle American countries. Article 3 of this Convention states:
The acknowledgement of a copyright obtained in one State, in conformity with its laws, shall produce its effects of full right, in all the other States, without the necessity of complying with any other formality, provided always there shall appear in the work a statement that indicates the reservation of the property right.
Adding the phrase "All rights reserved" was enough to comply with this article.
The phrase "All rights reserved" indicates that the copyright holder does not want to give up any of the exclusive rights he has under copyright law. This is only relevant for members of the Buenos Aires Copyright Convention.
Today all members of the Buenos Aires Copyright Convention are also member of the Berne Convention. The Berne Convention states that unless explicitly stated otherwise, all rights are reserved. Further, a copyright law may not require any formalities as a condition for copyright protection. Therefore "All rights reserved" has no legal significance anymore.
Wikipedia echoes the same information:
The requirement to add the "all rights reserved" notice became essentially obsolete on August 23, 2000 when Nicaragua became the final member of the Buenos Aires Convention to also become a signatory to the Berne Convention. As of that date, every country that was a member of the Buenos Aires Convention (which is the only copyright treaty requiring this notice to be used) was also a member of Berne, which requires protection be granted without any formality of notice of copyright.
Is adding "All rights reserved" only a legally insignificant reminder to the reader that author is by default the copyright holder of the piece of work and that he did not give up any of the exclusive rights he has under copyright law? Has the mention "All rights reserved" turned to be useful in the jurisprudence since its legal obsolescence?