I hope I will be forgiven for being unable to answer this question
quite as patiently as I used to when it first began being raised, well
over a decade ago ago: http://bit.ly/version-nonproblem
#23. Version control (from the OSI Self-Archiving FAQ):
When I was pitching self-archiving to some colleagues last week, two of them
mentioned the following argument AGAINST self-archiving. University
bean-counters have started using the number of times articles are downloaded
(from publishers sites, I guess) as a measure of faculty productivity or