The pet description page (http://subeta.net/pet.php?act=desc&petid=etcetera), presumably in some sort of attempt to sanitize HTML, behaves rather oddly when faced with unpaired angle brackets; they are run into the nearest tags. To wit:

"&lt;" and "&gt;" become "<" and ">" in the source and cause the same display issues. "&;" and "&;" are unchanged in source. This means that they do display properly in page text (although when the form is reloaded they become merely "<" and ">", making it necessary to retype them every time an edit is made)... but they do not work correctly in CSS.

">" is an important CSS3 selector; currently it is totally unusable. ">" deletes everything between it and the opening <style> tag, making a hash of things; "&;" is a syntax error.

Rendering user-generated HTML is a fussy business, I know. But can anything be done—a sanitizing exception made between <style> tags, perhaps—so that I can write clean code in pet descriptions, as I can in CustomCSS?

I apologize if this is a known issue, but the forum search is broken.

Are you still experiencing issues with this?

Yes.