What site do you use? I can speak about esoui.com only.
I use Minion as an addon manager, but it occasionally fails to unzip an updated addon. 41 addons, some running OK outdated. Keep an eye on the comments page of the addon.
Regarding links in chat - this happens to me as well sometimes. Reloadui (hotkeyed thanks to one of the addons) or relog to fix it. Even with all addons disabled this has happened, so it's not solely a problem caused by addons. I'll admit it's been awhile since I tested it.