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I've been running 7.0.1 for ages. I had no indication from using the Application that any new stable version (7.1.1) was available. Furthermore, if I explicitly check for updates (Help > Check for Updates) there is no indication that a new version is available. These days, I don't expect to have to visit a website routinely to check whether a new version is available. Applications nowadays typically have some indication that a new version is available, and I would certainly expect that if I explicitly check for new updates, I would be alerted to the existance of a new version of the IDE. However, I do not expect to be notified of non-stable releases by default.
ben2, you should be notified through bubble in the IDE, not through update center. NetBeans 7.1.1. is update of NetBeans 7.1 not 7.0.1