I'm still having problems with my D88 which is driving me mad with frustration. The black ink is not responding properly, it worked for a while when I replaced the ciss system and now its playing up again. I put a set of ordinary inks in the printer and it printed fine so that kind of eliminates the black head. Has the ink got a shelf life by which I mean does it go gloopy at all or separate in some way? It looks ok but I put some fresh ink in with some that is probably about a couple of years old and wondered if that might have a bearing on the problem. Although it looks ok its a bit difficult to tell with black ink.