Canon says "due to certain incompatibilities between Mac OS X Lion (10.7) and our previously released Mac OS X 10.6 Printer and Fax drivers, you may not be able to print and an error log file will be generated that could potentially fill up the hard drive of your Macintosh computer."
MacBook Pro, Mac OS X (10.7.3)
Welcome to Apple Support Communities.
Your post title is very misleading!
This is not a PRINTER incompatibility, and not for the model MG5220 that you mention.
From the link you included, the MG5220 printer IS NOT LISTED among those affected by the driver incompatibility.
And most important, the problem you list is caused by the incompatibility of older OS X 10.6 "Snow Leopard" printer drivers when used with OS X 10.7 "Lion"
The problem is easily solved by downloading and installing the (newer) correct printer drivers, designed for OS X 10.7
In addition to kostby's correct reply, the supported printer list for Lion shows the MG5220 (aka MG5250 in other regions and thus shown as MG5200 series in the list) is supported and its printer and scanner driver are available from Apple's Software Update. So when you do select to add this printer to your Lion Mac, the printer and scanner driver will be downloaded from Apple and installed.
I arrived at this link from the MG5220 page. If you look at the link in my post, you'll see MG5220 as part of the link — you are correct it's not listed on that page.
I have the latest software and drivers available at Canon and Apple.
Found solution at http://support.apple.com/kb/TS3147
Canon MG5220 not compatible with Lion
