#8 error when posting

[Fogagnolo Fabio]

The bug fix for Firefox doesn't work with
Firefox/1.5.0.4 and taconite-1.5-20060101:
trying to set the request parameter "Connection" to
"close" generate this javascript error

Error: uncaught exception: [Exception... "Component
returned failure code: 0x80004005 (NS_ERROR_FAILURE)
[nsIXMLHttpRequest.setRequestHeader]" nsresult:
"0x80004005 (NS_ERROR_FAILURE)" location: "JS frame ::
http://localhost/app/taconite-client.js :: anonymous ::
line 303" data: no]