Migration from 5.x-1.3 will loose all release file information

I use 5.x-1.3 and spent a couple of hours trying to figure out why the migration was loosing all the release information. I use postgres 8.3, but I believe that is not the problem.

While looking at step 6002, I fount line 427 suspicious:

    if (file_exists($file->file_path)) {

This does not check for the existence of files in the place where releases are placed. As a result no file is migrated. I tried changing it to (project_release.install line 427):

 if (file_exists(file_create_path($file->file_path))) {

This way all my file definition moved. I assume this will affect other user that use the release mechanism.