I posted this in the other thread, but since this one is much larger, I put it here also.
Hardware: A1
Firmware: 1.31NA
Shareport: 1.10
USB device: Canon Pixma iP2600 Printer
PC no.1: Desktop with Windows 7 RC 64bit, wired connection
PC no.2: Sony Vaio Z590 with Windows 7 RC 32bit, wireless N connection
PC no.3: Sony Vaio T250 with Windows XP SP3, wireless G connection
Problem: Same problem as others. Printer works after router reboot for a couple of hours. After that it will be unable to connect. If I then reboot the router again everything will start working automatically for a few hours. Rebooting the computers, the printer, or shareport itself does not help. Only rebooting the DIR-655 works.