Re: feedwordpress and php warning
@mark, make sure you upgrade your FeedWordpress plugin as I’m guessing you upgraded from WPMU 2.7.1 to 2.8.4a.
FeedWordPress has undergone major changes since then to be compatible with 2.8+.
Oh! and also overwrite the default WordPress RSS library with FWP’s Magpie RSS library.
For more, read the upgrade installation instructions:
https://wordpress.org/extend/plugins/feedwordpress/installation/