How can I solve the incorrect U052 error problem?

[mnaclerio]

You can't and Canon ain't inerested sign up the online petition google it

[rbdb6843]

I have the very same problem, although I have the MP530.  The U052 check cartridge came on right after I changed the cyan cartridge.  I tried another new cartridge, cleaned all the contact pointswith no luck.  So many of us get this error message that it makes me wonder about how good this product is.  Maybe I should run out and get an HP.