I just got further info from my friend:

System Spec: CPU 1.2GHz, 512 MB, 500 GB hard drive
Op Sys: not yet known
Printer: Canon Pixma IP2000

She can access other web sites, read and send gmail. When she prints the gmail, the printer gives a blank page. She's using Firefox and Safari and both of them have the same problem.

Thanks for any suggestion.