Open the Puppetclasses page, edit a puppetclass.
Go to the Smart-Variables tab, edit or create a smart-variable.
We'll add 3 errors:

• put a blank name
• select a type validator of "regexp"
• type "^good" in validator constraint
• type "foo" as default value
• add a matcher, type "bar" for its value

Submit the form.

We have two kinds of problem:

• The Smart-variables tab isn't highlighted in red (check for each smart-var to be so too)
• (The name field has no problem and has a help_inline of "can't be blank")
• The default value and matcher value fields are completely broken and appear partially as raw text.

I suspect the fields with errors suddenly no longer understand the :help_inline attribute, that gets written as an arbitrary HTML tag argument, which is unfortunately .html_safe.