The "Browser not responding" bug from long threads appears to be back. Some threads lock up my browser for 10-15 seconds (and in doing so, nothing else can be clicked either). MOST of the thread will load, then the freeze occurs.
Edit: it appears to hit the second the browser FINISHES loading the page, but of course, prevents you from scrolling to the bottom of the thread. The "Forum Change" thread is one of the current worst offenders. If the previous bug holds true, then it will only affect the nearly full parts of the thread, and the start of a new page is typically not affected until it hits 30 or more replies.