I have encountered this too during the v494 testing where if you do not provide any icon file for any object, map_text will not function. I'm not so sure if it was intended or a bug, which is why I'm making it a feature request to make known map_text needs a working icon (even if completely transparent) to function properly.
If it is a bug, however, feel free to move it or I'll recreate this post as a bug report. Currently, a functional icon file is required (even if it is completely transparent) as an icon variable set to null will make map_text not function properly.
Jun 16 2012, 8:57 pm