issue of libgtkembedmoz for Acrobat 8.1 reader

When starting the acrobat reader 8.1, I got an error message that libgtkembedmoz cannot be found.

Fixed this issue by reading the link of http://blogs.adobe.com/acroread/reference/.

In sum, run "ldd `which yelp` | grep libgtkembedmoz" and then put the corresponding directory (/usr/lib/firefox for my situation) in the Edit->Preferences->Internet->libgtkembedmoz folder. This fixed the issue.