Eclipse cannot contact update site

[Marcus Better <marcus@better.se>]

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Hi,

since some time (weeks, or a couple of months at most) my Eclipse 3.5.1 
cannot contact any update sites whatsoever. It complains about connections 
failing with "invalid argument".

The strange thing is that I tried with both settings of net.ipv6.bindv6only,  
without success. However adding -Djava.net.preferIPv4Stack=true fixes the 
issue. Any idea what is going on?

I'm using openjdk-6-jre 6b18~pre2-1 on amd64.

Cheers,

Marcus
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