2.5 won't export .obj files

I’m using Blender 2.5 and it won’t export .obj files. Everything else works. How to fix.

Thanks

It was recently fixed, are you using a newer build? http://lists.blender.org/pipermail/bf-blender-cvs/2010-September/031257.html

yes I’ve been using later builds than that, still the same issue

however I just downloaded JesterKing installer and it works great. thanks