I posted here a while back regarding an issue I had with my 4900 and its inability to clean a C nozzle. Epson replaced that printer and--other than having to clean it more regularly than my 7880--all was fine until this afternoon. The replacement 4900 was unable to completely print a 17x42" print without clogs in LK and LLK printheads, ruining the print. The second attempt resulting in all LK and LLK nozzles becoming clogged during printing (I've never had a print head become clogged like that while printing and using the ink that got clogged). After the first power clean, PK became clogged and so I performed another clean and another power clean. After the final power clean, new PK nozzles were clogged along with the old ones so I called Epson. They're sending another replacement printer. While I'm very pleased with Epson customer support, I'm curious as to other's experiences with their 4900s and print head clogs. Are you finding yourself having to clean the print head more relative to your other Epson pro printers, if any? I like the 4900, but it seems to clog much more than my 7880.