Hi fhoofman,
I think the problem is being caused by the shaders currently interpreting some of the furniture models as to reflective.
If I remove your black window frames from behind the viewer then re-render the scene it looks like this.
Probably the best thing to do for now is, export just the furniture that is being rendered as too shiny as an .obj file and remove their shininess values, then import and use those versions instead.
Another option instead of exporting, changing values then importing is just hide the black window frames (behind the viewer) while rendering.
which produces this result.
Here is the same view rendered using Uber which has prevented parts of the scene from blowing out to white but currently (until it is tweaked) renders some textures (notice the table) as grey/silver.
Hope this helps,
db4tech
