Might I suggest 'mtr' to all of you? There are versions out there with IPv6 support too. Using the -r/--report option will generate a nice report from which people can actually tell what/where something is wrong. Saying "somewhere at sometime something went wrong" simply doesn't say nor write anything and there is nothing we can do about such vague descriptions. Next to that I must mention that it is a known fact that there are quite a number of installations out there that have icmp-limitting, thus icmp doesn't always tell the truth. Fortunatly we have graphs to your endpoint, which most of you didn't check apparently as they show no oddities whatsoever. If you got real numbers and times, don't hesitate to contact the staff about these kind of issues, as described on the main forum page. But remember as written on the contact page, don't forget to include those real numbers as we can't tell anything else and will simply answer with that we can't help you out.