Hello, i seem to be having a similar issue.

I also am trying to import a sketchup converted dae (tried with 'triangulate all faces', did not help). it almost looks as if the 3D model preview thumbnail is blank but in fact it is just a very tiny version of the 3D model.

I have tried increasing the size in furniture editor but it seems to have no effect (that is, the thumbnail looks the same no matter what i do).

Upon closer inspection, the thumbnail seems to have a speck in the corner in the 3D model, but in sketchup there is no such speck or object.

can anyone point me to a sketchup tutorial on how to fix this (assuming it's a sketchup issue...) or other relevant site to read more about it.

the model i am trying to import is here:
http://sketchup.google.com/3dwarehouse/ ... revstart=0

another bike model (a red one) imported normally:
http://sketchup.google.com/3dwarehouse/ ... revstart=0

Screen shot of the model in furniture editor (after .dae export). note i have pointed out the spec of 'something' with a big red arrow. you can see the bike shape clearly in the opposite corner of the thumb view.
http://dl.dropbox.com/u/9396423/Tiny3D.PNG

Screen shot of the model in sketchup (before exporting to .dae)
http://dl.dropbox.com/u/9396423/NormalSketchup.PNG

Ta,
Agnieszka.