No it doesn't conflict at all. On the contrary; it complements and enhances other processes (agile or not).
In fact, it's one of the sweet spots of kanban. It can help you improve if you've reached a plateau in your current process. I know of a lot of teams adding the kanban principles to both Scrum and XP.
There's a guy called Corey Ladas that even made a hybrid method called ScrumBan (yeah, you can probably guess what that's made up of ). Read more about it here: http://leansoftwareengineering.com/ksse/scrum-ban/. In reality it's about going from Scrum (an iteration-based method) to a more flow-based approach with a lot of the values from Lean incorporated into the process.
Hope this helps
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