Ubuntu 12.04 install from binary / sunab repository / source

Hi all,

Use kdenlive quite a bit and rely on it for work, so thanks to creators. Inadvertently an update was applied to ubuntu 12.04 that removed kdenlive, and I am having great difficulty fixing this. I have tried purging repository and adding it again, dpkg, installing the source and the binary, as well as the ubuntu software centre. I keep getting dependency problems and broken package messages. Any advice is much appreciated. Thanks