I almost never have more than a single browser window open as I use tabbed browsing a lot. Just now however I hit Exposé tile windows button and there were about 20 browser window littered around the screen. Even more worrying is that they all appear to have some relevance to what I've been browsing over the last couple of days and were not there an hour ago. It's as if somehow my cookie jar's been raided to see what I'm interested in and a bunch of commercial websites have opened themselves in browser window to fulfill my needs. Anyone else seen this before?