printer always prints 4-one-page

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http://askubuntu.com – My printer started to print 4 pages per side just like if I had it this way (but I did not, and if I do it prints 4 tiny pages on 1/4 of the sheet). I tried with different applications (Libre Office, Envince) and to restart the system, but it remains the same. The printer is an canon i560 which never caused me problems so far. Is there any way to reset the printer to normal behaviour? I use an Ubuntu 12.04 with an 3.4.0-030400rc1-generic Kernel. (HowTos)