Reflections are displayed nicely in preview, but not in final render I'm running into a strange situation in Blender, where reflections show up nicely in Preview, but not in the final render (using Cycles). What could be the cause of this?

Preview:


Render:


here are my settings for Cycles:


and my blue, glossy material:


Is there some settings I'm forgetting about?

Here's the file:
This is caused by the simplify option in the scene-tab (at the bottom  of my screenshot).
simply disable it and you're good to go. you can also set the "AO bounces render" to 0 if you want to use other options of the simplifier (simplify subdivisions etc.). This option limits all non-diffuse bounces (0 = no limit)