(I've also posted this at another thread.) I tried both Internet Explorer and Netscape but it NEVER worked for me-- I kept on getting those error messages. I tried probably about 100 times or close to that. I finally got tired of it and sent it via snail mail. But I've heard that some people actually successfully got their app in on-line.
I was finally able to submit a little while back, after trying every day for over a week. The only difference I noticed was that when I was successful, I submitted it early in the day, during business hours (it was like 10 am Mountain time, I think). All the other times I had tried at night. So maybe the ticket is to try early in the day?? Good luck with it everyone, I honestly was close to just saying to hell with it, when finally it just worked.