Problem with Google Base Feed Reference to undefined entity

I am using google base feed improved and when I added some new products it stopped working.
Here is the error it shows on the feed page
Reference to undefined entity 'reg'.
Line: 1000 Character: 20

<title>Zippo&reg; Pocket/Hand Warmer </title>
I did have the problem with Reference to undefined entity 'Acirc'. but looked it up and fixed it by

Open
/catalog/controller/feed/google_base_improved.php
find this
htmlentities($value)
around line 131 and change it to
str_replace('&Acirc;','',htmlentities($value))

Thanks a lot

Please help!

Why not do the same for &reg; like you have done for &Acirc;

It is a html entity for a registered trade mark