I had the same problem and followed the instructions to reset my accounts. After completing, I did start receiving some of my emails on the BB. My guess is that my email client was removing my email from the webmail account before the BB had time to see that there was mail there to forward. I did two things, one being setting my account to leave messages on the server for 1 day, and changed my pop3 pickup of mail to 10 min. I get all emails now and have set my delivery back to 1 minute for my pop3 account.
Thanks for the instructions