In an era when most research efforts are publicly funded through federal, provincial and other government programs, open-access journals seem a natural “public” return on the initial investments. However, the existence of various levels of “open”  (which also dictate how the results can be re-used) appears to blur the issue. Concerned researchers or simply interested science followers, here is an interesting read in Nature: Researchers opt to limit uses of open-access publications : Nature News & Comment.