(Or, an adventure in pain!)
Let me preface this little article by saying I did not write the app I am now porting to our new network. I know noting about its specific intricacies, and furthermore, I know nothing specifically about gettext, file_column, or attachment_fu. So, I dove into this project with a sort of wanton abandon that is fairly characteristic of much of the work I do. Any obviously stupid mistakes below thus really happened.
Let me also preface this with the fact that this Rails app is old. Version 1.2.3 old. So, as always, YMMV.
Finally, I really wish attachment_fu had proper documentation.
