WARNING: xxx.mesh is an older format ([MeshSerializer_v1.40 ]); you should upgrade it as soon as possible using the OgreMeshUpgrade tool.

[Jukka Jylänki]

https://github.com/realXtend/naali/commit/fec9454aad53050234b3c684dfebf9db8e75d47f

I added the Ogre command line tools directly to the tundra repository in
the folder trunk\tools\Ogre. When loading a scene in Tundra, if you get
the MeshSerializer warning about loading a mesh in an older format, run it
through the OgreMeshUpdgrade, which will update it to Ogre 1.7.3 format
(MeshSerializer v1.41). If you have an exporter which constantly generates
1.40, provide it with the new OgreXMLConverter.exe (if the exporter uses
this tool), or see if it has an update available.

This warning is not critical though, and Ogre 1.7.3 is still able to load
meshes from format 1.40.