curl -F ‘image=@test.png;type=image/png’ -H ‘Expect:’ -u username:password http://twitter.com/account/update_profile_background_image.xml hmm nice. the logical thing to do. instead of text messages, send images… update: turning tiling on. curl -F ‘image=@test.png;type=image/png’ –F ’tile=true’ -H ‘Expect:’ -u username:password http://twitter.com/account/update_profile_background_image.xml second -F flag creates second form field. update: same applies to user profile image curl -F ‘image=@icon.png;type=image/png’ -H ‘Expect:’ -u username:password http://twitter.com/account/update_profile_image.xml update: absolute image paths curl -F ‘image=@/Users/x/Desktop/icon.png;type=image/png’ -H ‘Expect:’ -u username:password http://twitter.com/account/update_profile_image.xml there seems to be a bug in the max shell object, preventing cd to work. it also does not like relative paths (~)…