Thank you for your post.
This has been previously reported at:
...and it appears you have also posted there.
Our Testing department has verified this issue, and it was sent to Development for further review. I do see some notes that this was also reported to Apple Computer regarding a possible limitation with their web kit. No other information is available is available at this time.
I have attached your post to the original report, and I will keep you updated when more information becomes available to me.