I'm really not certain why you're having that trouble. I don't have it any I followed the directions very closely and installed multiple times. I used HF5RC1 and haven't tried the newer versions since they don't appear to offer much as far as my needs are concerned.
I'm not sure either. I used the latest RC although there is no diff that would benefit me either. I'm up and it's running right now, but I had a KP when I left it while it was downloading Google Chrome. Subsequent restart tries, resulted in KP with varying errors. I left it off for 5 mins, came back started and it booted right up. I ran dmesg and the results were clean and not suggesting where the problem is. Anyhow, I apologize for being off-topic, but I'll be checking back here at least daily.