The UI is broken, on Sublime Text 2 build 2221.
What I did
According to the forum post above, it is seemed to be an issue of the sublime package control's automatic update function.
- Backup the setting file of the package control
- Re-installed the package control
- Re-installed the packages
(this fixed the issue, however, seems too obvious and destructive.)
I've just recalled that to delete "ignored_packages" value in "Preferences.sublime-settings" work for this issue.