Works for me now on Safari. Tested with a 15+ meg file. Browser responded to the change immediately; about 4 seconds of buffered data still went over the wire, but did quickly stop chewing bandwidth.
If this is still an issue, more details will be helpful.
- Browser name, version
- OS name, version
- How long it appears that things are "busy" (and how you're detecting this).
Marking as "resolved", as I'm assuming something has been fixed in the last couple months. If you do follow up with more details, please mark the thread as "not resolved".