Firefox 18.0.2 messing up some web pages

[JD]

I have browsed many web pages that FF does no display properly.
Text of one line gets superimposed on another.

I do not know if it's my options settings causing this.
the add-ons or just firefox.

Try this link

http://georgegrantsoundhealing.com/GGSH/HOME.html

The last line is two lines superimposed.
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