Not valid RSS feed

hey, i got problem with my feed, it is not valid, i check this on http://feedvalidator.org

i think this happened after upgrade to 2.0.1 or 2.0

you can check it here http://feedvalidator.org/check.cgi?url=http%3A%2F%2Fwww.franto.com%2Fblog2%2Fcategory%2Fflash%2Ffeed

there is written i should not use content:encoded inside of feed.

I found out, because i was not aggregated by MXNA aggregator (for flash coders)

Does anyone knows what is the problem?