Imported From: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/20695723e4de34bd#
our standard SWF uploader. You'll see that when full url is built,
it's incorrect because file name is not urlencoded. Also this is
applicable to folder names in URL - for example, in URL
http://www.sitename.com/system/part1/part2/filename.ext part1, part2 &
filename.ext (& system?) need to be urlencoded. Another case is non-
formatter URL building to uploaded files, I found one in OnViewFile
event.