If you go here:
http://www.jeasyui.com/demo/main/index.php?plugin=Accordion&theme=default&dir=ltr&pitem=and click on "Help" or "About" Accordion menu, you will see that "TreeMenu" accordion become half hidden.
If you take look at attached image, you can see what I mean.
I saw that before some time when I used jQuery 1.9, then I went back to 1.8.2 and it worked fine (It works fine on my side, but looks like "jeasyui" use 1.9 now?