Ubuntu Kylin 15.04下右键点击启动栏的项目，弹出一个小菜单。移动鼠标后，小菜单消失。
PS：暂时的办法是当菜单出现后用键盘操作，或者重装。
https://bugs.launchpad.net/ubuntukylin/+bug/1403349
Right click items in Launcher, pop up a menu, the menu will disappear after move the mouse. This problem only exists in vivid x32 system.
右键点击启动栏的项目，弹出一个小菜单。移动鼠标后，小菜单消失。该问题只在vivid32位系统上发现
Steps:
1. Install the latest OS(Vivid x32 Daily Build 20141214)
2. Log in the system, right click the items in Launcher
3. After a menu pop up, move the mouse
-->Failed. The menu disappear