I was updating Demon Summoning (http://paragonwiki.com/wiki/Demon_Summoning) just now and noticed most of the power blocks were... malformed. There's {{{header}}} {{{text}}} strewn all about. Upon further investigation, I found Template:PowerBlock_Other2 (http://paragonwiki.com/wiki/Template:PowerBlock_Other2) was modified on Saturday, so this probably counts as a side-effect.
I'm not sure what Sekoia's edit to that template was doing, so I won't jump in to "fix" it, but some kind of tweak needs to be made to either the template or the articles referencing it.
Hmm... Yup, that affects all of the Mastermind primary sets due to the fact that template is used to document summoned henchmen and their training powers. Some of the Controller and Dominator sets with pets are also affected.
Edit: Ah. I see the problem. The templates are currently called with "Header" and "Text" parameters. The templates are now expecting "header" and "text" parameters without the first letter capitalized.
Edit2: A couple of quick little tweaks and I think everything is all fixed up now.
You'd think I would have known by now that parameters are case sensitive. :/ Thanks for the fix, Eabrace!