I have followed this tutorial and it installed nginx v1.1.19. When I go to nginx official site, I found out that the stable version is already Nginx 1.4.1 release May 7, 2013. I'm also wondering because the version 1.4.1 is labeled as "Source Releases". Is v1.1.19 the stable version for Official Debian/Ubuntu packages? Do I need to update it to 1.4.1?