I have a Brother 7840W Printer. I have a MacBook Pro using the first 10.6.5 Beta. I also have a Mac Pro that uses the public released 10.6.5. When sharing my printer only though the public release of 10.6.5, my iPad cannot find the printer and will not print. When I remove the sharing and activate sharing through the beta 10.6.5, I can still connect to my printer and print. For those that are still able to print on the publicly released 10.6.5, my guess is that upgrading from the beta to the public release still leaves some drivers that are not deleted and continue to allow you to print.