Comment # 6 on bug 1183642 from Tristan Miller

(In reply to Jan Engelhardt from comment #5)
> x2goserver had failed to build since a week or so. Now that's fixed. The
> Xresources file (symlink) was pointing in the wrong direction, maybe that
> was the cause.


Not in my case, since I wasn't using your packages, and in any case they were
not updated in the upgrade.  Your packages failing to build for a week can't be
the cause of Igor's problem either, since he had been experiencing the problem
for a lot longer than a week.

I don't think that the X2Go packages (either yours or mine) are at fault here. 
As both Igor and I mentioned upthread, the problem must lie with some other
networking- or security-related package.