Freesome - Pete Hobson

When building a project in Flex Builder. The source folder (usually 'src') is checked and any folders containing files other than .as files are copied into your output directory.

This would mean you could include a file structure by creating asset folders in 'src'. However FB seems a little buggy here, and often you will find a number of folders copied that should not be, i.e they are just actionscript folders.

I've found a cause of this is FB does not ignore hidden files. On the Mac this especially bad as viewing the contents a folder in Finder will tend to create a hidden .ds_store file. This causes the folder structure to be replicated in your output folder.

Not great, but you can manually delete these .ds_store files in terminal. This should stop the extra replication.