I noticed that I don't seem to be able to rotate TIF in DO without a conversion to JPG...In trying to fix this I came up with a nice lil workaround with IrfanView I thought I'd share...
Two Buttons
LMB "C:\Program Files\IrfanView\i_view32.exe" {file} /rotate_l /convert={file}
RMB "C:\Program Files\IrfanView\i_view32.exe" {file} /rotate_r /convert={file}
Works great...I'm learnign to Love DO