Let me describe my symptoms, and hopefully a 21st century doctor out there can diagnose the problem.
I think the behaviour is limited to Firefox. In short, it has recently become very slow to react to keystrokes and mouse clicks.
If I click a field in my blog's rich-text editor and start typing, the cursor doesn't appear, nor do the words that I type appear in the box. On occasions, it ignores the preceding mouse-click, and when it eventually wakes up it throws the words into the box lucky enough to have previously been the focus of both my attention and my cursor. Sometimes, it obeys the mouse-click but misses the first few keystrokes. Other times still, when it eventually kicks in, it picks up all previous actions.
If I click in the search bar or address bar, I get a similar lag, the words appearing a number of seconds after I have typed them. (As an example of the delay I'm talking about, after I'd typed the word "after" in the previous sentence, I had already typed the words "I have typed them" before they started appearing letter by letter.)
If I CTRL+TAB between tabs, it's similarly slow. And if I have an application open in the foreground and ALT-TAB back to Firefox, it takes a few seconds to appear.
I was recently upgraded (without being given a choice) to Firefox 2.0.0.1, and the only other change I can think might have made a difference is my virginal use of the newly installed IE7 (again installed without my active consent) recently.
It's killing me. Can anyone help?
