The software that is generating the link with trailing dots and underscores is creating links that are "copy/pasted parsed" differently in different browsers (Chrome/FireFox/IE/Opera) - also, different internet softwares will see those links differently (vBulletin/XenForo/SMF/UBBT and Facebook/Twitter...etc)

Have a quick read through #2 and #5 @ https://www.ubbcentral.com/forums/ubbthreads.php/topics/255500#Post255500

And the last few paragraphs @ https://www.ubbcentral.com/forums/ubbthreads.php/topics/255750#Post255750

Then contact the support site for the wiki software (?) that is generating those links. As them to sanitize their string before making it into a URL.

EDIT, to also include:
http://www.dns-sd.org/TrailingDotsInDomainNames.html
and some additional reading at:
https://bugzilla.mozilla.org/show_bug.cgi?id=134402


current developer of UBB.threads php forum software
current release: UBB.threads 8.0.1 // wip: UBB.threads 8.1.0
isaac @ id242.com // my forum @ CelicaHobby.com