Very interesting,

i tried it too with MoI and it exported nothing under OS X. Then i tried it with Shade and it exported fine as .obj. Once the .obj was exported i used Text Wrangler to add the name manually in the o section and re-imported into Shade, which then showed the proper .obj name of the object in it's Browser.

Regards
Stefan

Edit: the .obj file name does not translate, when uploading to the forum.