Hi all,
I stumbled across this thread with the same problem but found no resolution. I was getting the "Argument #1 is not an array in" error when uploading to the CDN. I later found the source of my problem and have come back to share.
The nail in the coffin was increasing the HTTP Timeout in Apache from 10 seconds back to the default 300 seconds. With my "Australian internet connection" it was the perfect storm to create this problem.
I also found that my PHP max_execution_time and max_input_time were very low. I've now increased each setting to 90 seconds.
I hope someone else finds this helpful.
Brendan
http://sysadminspot.com