I've had this happen a couple of times, so thought it perhaps worth of mention. Sometimes when I open a thread, the frames don't size appropriately and scrolling east to west is required to read all the text. However, other threads at same time will size correctly.

Example: Today I clicked on a thread found in the "In the News" Forum titled "BA 747..." and this one required scrolling. I then clicked on a thread in the "Hilton" Forum titled "Reward Discount Coupons..." and it sized correctly so that no left to right scrolling was required.

Any ideas why this would happen?