buddypress 1.2.4, admin bar partially not working


I just upgraded my Buddypress from 1.2.3 to 1.2.4, and found out that the My Blogs button in the dark gray Admin bar on the top of my web browser does not (partially) work. It shows the small triangle right next to My Blogs, which indicates there should be a pull down menu. However, even when I put my mouse over My Blogs, no pull down options. My Account works very well as usual.
This will make my members feel very uncomfortable. Do you have any idea?
My website is http://brainpeace.com

Thank you.