Virtools Wavefront OBJ Exporter version 3.x is a brand new version with a complete refactoring of the old code.
But something must have broken during the refactoring and I barely had enough time to check this. So if you faced with some weird behavior, please report bugs freely.
In 3.x series, this exporter is based on YYCC framework 1.3.0 and adds multi-language feature.