I thought I'd share something that just happened to me and see what various similar annoyances everyone else has experienced.
Just a minute ago I was trying to open up a new tab in my browser (Firefox) to view the threads here in a new window (I tend to open up each new thread in a new window, rather than cycling back to the index each time I finish one).
And my context menu (right click menu) was replaced with Apple's 'helpful' "add to dictionary" context menu. Clearly the browser was under the impression that I had highlighted some text somewhere (in an input field??) and wanted to add the word to my dictionary. But I hadn't. I was just browsing the forum index. And it didn't make any difference where I clicked. Rage followed.
Then I restarted my browser and all was back to normal.
It's sort of amazing how easy it is to become furious with one's computer though. But to be fair, they often don't do what they're supposed to do!!