>one is using a newer system for generating the claims within Internet Explorer 9, while the other two are using our older system that uses proprietary software.
Do you have an option to print to a file? You then could try printing that file on the good and bad sites.
If they work, that points to the driver and networking.
And of course the opposite, print to a file on the bad site and then print that file on the good and bad sites.
In the former case, If they don't match, it points to the printer.