Try a small image and see if you have the same problem.
With small images I don't have this problem. I am using a loader to load a byte's array.
If you loadbytes a lot of data, that could freeze things.
So, this is a question - can I do something about it? I know that there is no such thing in flex as threads, but may be is there something else?
In general, don't load large images via loadbytes and try not to load them
at all. Technologies like Scene7 help you match your source images to the
screen resolution and lower bandwidth and improve performance. Unless you
are doing image editing, why bring over more pixels than you can see?
BTW, how large (in KB or MB) is your image?
Adobe Flex SDK Team