Every time I try to push I get reject non-fast forward. If I push from the terminal it works just fine.
I am using Ubuntu Natty latest eclipse Egit plugin git https
I am not sure whether this one can help... because I ever having problem when pushing in eclipse but not in cmd. So I try to modify the Eclipse network connection setting
Or if it doesn't work,..
have you try again to re-setup, and Follow the guide http://wiki.eclipse.org/EGit/User_Guide exactly
Hope it helps, Good luck, :)