I’ve got this problem every time I load my rigged character file from a different computer and onto my Mac. It keeps on showing me this window.

‘Errors have occurred while reading this scene that may result in data loss. Please check the Script Editor for details.’

I don’t know what’s wrong. Can anyone help me? If it helps, this is what it shows in my Script Editor

file -f -new;
// untitled //
commandPort -securityWarning -name commandportDefault;
// mental ray for Maya 2010
// mental ray for Maya: using startup file /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/maya.rayrc
// mental ray for Maya: setup
// mental ray for Maya: initialize
// mental ray for Maya: using 1 license
// mental ray for Maya: register extensions
// mental ray Node Factory: loaded
// mental ray for Maya: successfully registered
// mental ray for Maya: loading startup file: /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/maya.rayrc
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/AdskShaderSDKWrappers.mi
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/architectural.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/architectural.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/base.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/base.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/contour.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/contour.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/paint.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/paint.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/physics.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/physics.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/production.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/production.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/subsurface.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/subsurface.so
// generating Maya nodes…
// parsing /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/include/surfaceSampler.mi
// loading /Applications/Autodesk/maya2010/Maya.app/Contents/mentalray/lib/surfaceSampler.so
// generating Maya nodes…
updateRendererUI;
updateRendererUI;
file -f -typ “mayaBinary” -o “/Users/cherineewong/Desktop/Ani Exercises/Cherinee Jump/Jump2.mb";addRecentFile("/Users/cherineewong/Desktop/Ani Exercises/Cherinee Jump/Jump2.mb”, “mayaBinary")
// File read in 0 seconds.
// Warning: Errors have occurred while reading this scene that may result in data loss.
Please check the Script Editor for details. //

Prob. Has nothing to do with Lion.  The script editor transcript indicates that you are opening a .mb file from your desktop.  My guess would be that any dependent files like textures are not being found, and that may be the cryptic data loss may is referring to.  Try creating a proper project folder, copy your .mb file into the scenes dir, set your project in Maya, and open it from the current project folder.