That's inside my regular Firefox browser on desktop (Windows 10). Forgot to mention that the broken character only shows up after the button is toggled; it shows up properly on all the buttons I don't press.
And yeah, sorry, I just use the shortcuts in my inbox instead of navigating through the forums. The beta forums are hidden otherwise. Should any future issues just go in the regular bugs section?
3)The great thing about readings is that everyone thinks something different :) jitenon and wikitionary have different lists (https://ja.wiktionary.org/wiki/%E4%B8%8A), and presumably the kanjidic file that renshuu is based off has it's own ideas. I did remove any readings that were not present in either of the two external links.