As far as I know this problem was never seriously investigated. And I have my doubts anybody would be able to reproduce it without knowing lots of details about your system configuration.

So there is no fix yet, but if you find one, you can post it here. First thing I'd try is disabling all firewall software on your system.

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Morgens ess ich Cornflakes und abends ess ich Brot
Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob