It would be better if you modify
< description > TEXT... < / description >
as

< description >"& l t ; p r e & g t ;"
TEXT...
& l t ; / p r e & g t ; < / description >

Because some RSS readers (including Bloglines, my favorite one) wrap all text into one paragraph if there is no "pre".

In RSS 2.0 standard, the HTML rendering of "description" and "content:encoded" is quite confusing.