I heard it is possible to export blender models to unity?
I tried and it gives me the error
“Blender could not convert the .blend file to FBX file
You need to use blender 2.45 or higher for direct blender import to work”
I have blender 2.57.1
Same, i have blender 2.57b…
you need to export it to FBX manually.
that will also help you identify problems in the setup, missing parts in the toolchain (unsure if fbx exporter script works without python install for example) and alike
Make sure you select the objects you want to import (I dont know if it is necessary, but I always do it )
Alright i found out how to work it now thanks!
File > Export > .FBX then save and import to Unity
There is also a script modification around here somewhere that allows direct work with the blend file like it was with 2.49b. But i cannot find it anymore 
I apologize if I didn’t get the core of the problem right, but I always have just drag ‘n’ dropped the blend file to unity and it imported without any problems O_o. I used blender 2.49b. The only thing I had to do is to reimport the texture.
edit
ouch, didn’t read the last post. have you tried opening the file with older blender and saving it there? sorry if I’m just talking rubbish. 
I stick to blender 2.49b as it works without problems using the .blend file just have to import the textures manually.
unity 3.2 and later should import blender 2.55+ files directly.
Yeah. Should …