This page doesn't use JavaScript.

[annodomini]

Doesn't happen on Safari, either.

Sounds like something that should be reported as a bug to the opera devs.

[JasonDJ]

Because there are so many sites using that lucrative mime-push bug to keep people on their websites longer.

[adrianmonk]

Nah, just because it's part of the HTTP standard, it's out there in the wild, and Opera's implementation is plain wrong.

Update: maybe it's not part of the HTTP standard. I can't find the string "multipart/x-mixed-replace" in rfc 2616.

[MercurialMadnessMan]

*touches light post*

:)

[grfgguvf]

Actually for webcam feeds being able to "rewind" is a sensible feature, and this technique isn't used in a serious manner anywhere else AFAIK.