I updated mine the other day, but I had to save, and re-save, and re-save again before it finally stuck (even though the changes were there in the textbox every time I went to re-save). I don't know if maybe there's some lag time in between updating it and showing the changes, or if it really took multiple re-saves to make it happen.
When I logged on this evening, my siggy still hadn't changed so the lag time didn't seem to help. However, saving multiple times worked! Thanks