Warning Message, Invalid argument supplied for foreach() and Duplicate entry

Hi,
I am getting the following error each time I upload a file. Everything seems to be working but I want to know if this may cause future problems
Cheers

• warning: Invalid argument supplied for foreach() in /Volumes/staging/www/modules/filefield/filefield_field.inc on line 127.
• warning: Invalid argument supplied for foreach() in /Volumes/staging/www/modules/filefield/filefield_field.inc on line 127.
• warning: Invalid argument supplied for foreach() in /Volumes/staging/www/modules/filefield/filefield_field.inc on line 127.
• warning: Invalid argument supplied for foreach() in /Volumes/staging/www/modules/filefield/filefield_field.inc on line 127.
• warning: Invalid argument supplied for foreach() in /Volumes/staging/www/modules/filefield/filefield_field.inc on line 127.
• user warning: Duplicate entry '120-0' for key 1 query: INSERT INTO content_field_video_thumbnail (vid, nid, delta, field_video_thumbnail_fid, field_video_thumbnail_list) VALUES (120, 120, 0, 476, 0) in /Volumes/staging/www/modules/flashvideo/flashvideo.module on line 732.
• user warning: Duplicate entry '120-0' for key 1 query: INSERT INTO content_field_video_finished (vid, nid, delta, field_video_finished_fid, field_video_finished_list) VALUES (120, 120, 0, 477, 0) in /Volumes/staging/www/modules/flashvideo/flashvideo.module on line 743.