Comment 2 for bug 289605

I'm also encountering this problem in Ubuntu 8.04 (Hardy Heron) and 8.10 (Intrepid Ibex) with a CLP-300. Gamma can be adjusted with system-config-printer (System > Administration > Printing) by going to Job Options > Image Options > More > Gamma but it's a trial and error process which wastes a lot of paper. I have to set it anywhere from 2500 to 5000.