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[Build of 20080404] -Create new update center provider (type "http://www.seznam.cz" to its url) -Push Remove button -Push No button ->> It is not possible to do anything for a couple of seconds because the url is not pointing to a valid catalog. This is not so usual case so that the priority is assigned to P4.
Reassigning to the new "autoupdate/*" owner dlipin.
I've just tried it and the check was fast.