I downloaded and installed IE8 beta 1 primarily to have a look at the new XDomainRequest object which allows for cross-domain requests. Unfortunately that old problem security gets in the way. Although the documentation implies it is possible to make requests to any server, it appears the server has to explicitly support the new request protocol. Ho hum.
Anyway, IE8 screws up lots of pages (most notably Google Maps) and although it claims to have an IE7 emulation mode, using this mode seems to make no difference at all, as far as I can see. So time to uninstall, at least until the next release...
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