The rage one feels when they they find out one of their favorite, or commonly used websites has "upgraded" itself again, which often starts out as rage, and then turns into lingering disappointment.
This rage is most often caused by the fact that the website was perfectly fine the way it was and now has been changed from the foundation up so that no one knows how to use it, or it just isn't as good as it was before. Rage also may come from the fact that a lot of the upgrades lead to websites not functioning correctly, or being really slow and annoying as hell because the creators wanted to stay hip, and ruined their website by trying too hard.
Sydney: "Jesus! I just went to myspace and they changed everything again, and now everything is stupid and crappy."
Briana: "I know, I can't even figure out how to edit my about me! I'm fricking Upraging right now!"