Have any of you noticed a huge decrease in performance when going from Firefox 3 to 4? I only have a mini with a 1.83 C2D and 2gb of ram running 10.6.7. It's not much but should it be enough for a browser to bog down? Things were super smooth with 3 but when I went to 4, I noticed a significant amount of lag. I mean bad enough to where if I were switching from 1 tab to another, I'd see the beach ball spinning! It was really horrible and I ended up moving back to 3. I deleted 4 and reinstalled, but same thing.