Smarty/token processing fails with embedded CSS
After upgrade to 5.65, sending scheduled reminders with embedded CSS in them fails because the parsing interprets something like selector { attribute: value; }
as broken smarty. Not entirely sure when this problem was introduced, but lots of reports after 5.65 was released, so that seems likely.
Embedding CSS in an email may or may not be wise, but it definitely is a valid thing to do, so our smarty/token parsing is broken if it fails on that.