I'm having the same sort of issue (with my Epson 1400). The ink is blobbing towards the beginning of the print, and smearing across the first few inches (sometimes more). I have refillable CISS style carts (from
InkJetCarts Home Page). Everything seems to work perfectly on paper, even with the same print settings (ultra premium glossy photo paper, highest quality settings), so I'm wondering if it's the film material scraping the print heads or something. Very strange. I'm using Ulano pigment 11x17 film. The inkjetcarts.us docs suggest an air problem, but I'm not sure how that would translate to these problems, and why it would never seem to happen when printing to paper, only film.
Paul