Three weeks ago I have asked the following question to the Library:
Subject: My contribution Old MathSource #0210-092
On my homepage, the URL on that item, section Geometry and Algebra, subsection Spheres, or in the section Mathematica, you can find two downloads: sphs4.tgz (for Linux, Unix) or sphs4.zip (für Windows). These are packed new versions of the files with the same names contained in the item cited above. I would be very glad if you would download the new versions from my homepage and replace the files of the item by the newer ones.
Is it possible to submit other new notebooks and packages to Wolfram Library Archive, and how it can be done?"
I didn't get an answer up to now, Dec. 15. In the meantime I learnt how to submit new items, but the first problem continues to exist. In fact, my old versions have not been replaced by the new ones as I proposed in my message. The question is: How may authors update obsolete versions of their submissions by actual ones? The problem seems to be a general: I tested the notebook "Exterior Differential Calculus" of Sotirios Bonanos, Old MathSource #0210-935, Revision date 2007-06-08, which does not work under Mathematica V. 7. Googling I found his homepage and their a new version which runs well.
I think it would be good for the authors, the users, and not least for the Wolfram Company, if an easy and safe method would be fixed to enable the authors making updates of their contributions.