Thawte "SuperCerts"

[Marcus Leech]

The Thawte folks are busily promoting their "SuperCerts" which enable
128-bit
  symmetric modes in "International" versions of the various browsers.

I guess I've been out of touch--is there an extension in web certs that
enables
  better than 40-bit symmetric SSL modes?  My assumption has always been
that
  a 40-bit (or 56-bit) browser was "nailed" to that particular key size,
or
  lower.