Fixed: attachments with the same name at the same time overwrite (#3691).
Allow project custom fields to be searchable (#4945).
Fixes a test failure due to a default custom field value.
Adds missing fixtures.
Merged r3506 for 0.9.3 release.
Update for 0.9.3 release.
Merged r3469, r3472 and r3473 from trunk.
Merged r3498 from trunk.
Merged r3481 from trunk.
Merged r3446 from trunk.