A week ago my HP G55 All-in-one printer-scanner-copier started giving false (pretty new cartridge) "black cartridge low" messages, then went away. Today, I sent a print job to the G55, turned around, and there was a pool of black ink coming out the bottom of the printer. Panic! I got a bunch of towels, unplugged the printer, and managed to save the carpet. So what the heck happened? I pulled out the black cartridge later and didn't notice anything unusual, but the bottom is covered with ink, and when I tip it sideways, more ink comes out the bottom. Any ideas on this one? Thanks.