Coupon printer doesn't work in Windows 7 64-bit RC

Many coupon sites use the coupon printer software from Coupons, Inc. When I tried printing to it from Firefox 3.5 or Internet Explorer 8 in the Windows 7 64-bit RC, I could see the print job appear in the print queue, but it never got further than spooling.

Here's how to fix the problem:

1. Right-click your Firefox shortcut, and select Properties.
2. On the Compatibility tab, select Run this program in compatibility mode for, and select Windows XP (Service Pack 3) from the dropdown. Click OK.
3. Start Firefox. You may have to click past a User Account Control (UAC) prompt.
4. Open your coupon site and print the coupons.
5. Change your Firefox shortcut back to normal mode by unchecking the box you checked earlier.

Source: Microsoft TechNet: Coupon Printer Issue