1. This version of Windows has typos in some of its programs, such as "Windows Calendar" being misspelled as "Windows Calender," and many grammatical errors in Windows Mail's Welcome message, such as "in that newsgroups" instead of "in that newsgroup," and "Windows Media Center" being misspelled as "Window Media Center" in the Help and Support Center.
2. The RTM of Windows Vista (i.e. build 6000) was actually the build of Windows Vista that faced the most criticism.