In that letter the person's primary concern seems to be circulating around the glitches and bugs of CPA Exam software. I can completely understand what he went through because I faced the same situation for my exam. The old calculator program didn't work at all. I informed the same to Prometric staff member who reported the bug to NASBA right before me.
After coming home, I immediately emailed NASBA with details and also called them the following day. My exam was scheduled in the evening, the time when we are only received by answering machines. It took me two hours on phone to effectively communicate with the right person. My call was forwarded from one person to other and I waited online for hours..
