What browser are you guys using? Are you using an Add-On?
On the latest basic Firefox, the only errors the "preview" shows are broken <ref> links in Bold, with language designed to help you correct the issue. Nothing is in Color and it ignores templates, especially anything inside {{}}.
A broken "name" ref without the final "/" is also ignored, except that it tries to continue the ref into the next paragraph/sentence. Template errors related to brackets just shows the template in the text.
The Enhanced editor lays out the links and lets you see the boundaries of the <ref></ref> sources, but only shows red if you mess up either the ref or /ref tags. I find the enhanced editor to be a great tool when working with lots of inline sources/references, but the regular editor using Firefox only shows that there are errors and does NOT show typos in templates, it just shows the template as if it was what you wanted.
My original question was to see if the profile posting process, that already looks at dates of relatives, and missing fields, could be enhanced to flag broken links and templates. I realize this would be an additional search through potentially large field, but in my case, would have avoided over 100 errors (due to my misreading the "FindAGrave|####|sameas=xx" instructions that led to me capitalizing sameas.
Wikitree+ seems to be able to do that search, I'd just like to see it flag errors when you go to post them, not 2 weeks later when they turn up under Suggestions.
rsl