I upgraded from 3.35 to 4 and now when i try to publish the site i get an error:

An error occurred publishing date-based archive 'Author-Monthly20080401000000': Publish error in template 'Entry Listing': Error in <mt:Include> tag: error in module Header: Error in <mt:Link> tag: Can't find template 'styles'

i have no idea where to fix this....any takers:-)

i figured it out. somehow my style sheets was named something else when it needed to be named styles.css