Kovid, thank you, that's what was needed.
The recipe is now fixed and works. Here is the final version if you want to use it in the program.
Spoiler:
from calibre.web.feeds.news import BasicNewsRecipe
from calibre.ebooks.BeautifulSoup import BeautifulSoup, Tag, BeautifulStoneSoup
class dotnetMagazine (BasicNewsRecipe):
__author__ = u'Bonni Salles - post in forum if questions for me'
__version__ = '1.0'
__license__ = 'GPL v3'
__copyright__ = u'2013, Bonni Salles'
title = '.net '
oldest_article = 7
no_stylesheets = True
encoding = 'utf8'
use_embedded_content = False
language = 'en'
remove_empty_feeds = True
extra_css = ' body{font-family: Arial,Helvetica,sans-serif } img{margin-bottom: 0.4em} '
cover_url = u'http://media.netmagazine.futurecdn.net/sites/all/themes/netmag/logo.png'
remove_tags_after = dict(name='footer', id=lambda x:not x)
remove_tags_before = dict(name='header', id=lambda x:not x)
remove_tags = [
dict(name='div', attrs={'class': 'item-list'}),
dict(name='h4', attrs={'class': 'std-hdr'}),
dict(name='div', attrs={'class': 'item-list share-links'}), #removes share links
dict(name=['script', 'noscript']),
dict(name='div', attrs={'id': 'comments-form'}), #comment these out if you want the comments to show
dict(name='div', attrs={'id': re.compile('advertorial_block_($|| )')}),
dict(name='div', attrs={'id': 'right-col'}),
dict(name='div', attrs={'id': 'comments'}), #comment these out if you want the comments to show
dict(name='div', attrs={'class': 'item-list related-content'}),
]
feeds = [
(u'net', u'http://feeds.feedburner.com/net/topstories')
]