Table of Contents macro displays </h1> when heading ends with a Japanese dot character - or contains a Japanese comma character

When you have a heading that ends with the '。' character, the text "</h1>" appears in the table of contents output.

This appears to affect content arranged in certain combination.

See the attached screenshot:
booya.png
ToC_RenderedImage.jpg

A sample HTML source is attached.

Sample wiki markup:

{toc}

h1.1234。
{loremipsum}
h1.12345。
{loremipsum}
h1.123。
{loremipsum}

This also affects Japanese comma character, also broken when the headers are arranged in certain order.
Sample markup:

{toc} 

h1. Google、Yahooなど 
h1. あいうe、Yahoo 
h1. あいうえ、かきく 
h1. たちつて、となにぬ 
h1. たちつて、となにぬ(これは発生しない) 
h1. 今日は、雨が凄い 
h1. PSP、インストール手順 
h1. PSP(ProLiant Support Pack)、インストール手順(発生せず) 
h1. 「Pukiwiki」からの移行計画 
h1. 「旧ウィキ」からの移行計画 
h1. 「あ」 
h1. 「あ」いうえお 
h1. テスト・始めます