[O] Bug: Command "org-toggle-pretty-entities" does not display x_{i}^{j} correctly [7.9.4 (7.9.4-elpa @ /home/jae/.emacs.d/elpa/org-20130325/)]

[Jae Hee Lee]

Command "org-toggle-pretty-entities" does not display x_{i}^{j} correctly.
When subscript and supersript _{i} and ^{j} are combined, _{i} is 
displayed correctly as subscript, but ^{j} is not displayed as superscript.

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Emacs  : GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10)
 of 2012-09-21 on batsu, modified by Debian
Package: Org-mode version 7.9.4 (7.9.4-elpa @ 
/home/jae/.emacs.d/elpa/org-20130325/)