Code:

input, select, textarea, tr.header, span[class^="status"], .navtd, .nav, img { font-family: Tahoma, Arial, Helvetica, Verdana, sans-serif; font-size: 100%; }

putting that in the theme css of the davis theme fixed pretty much everything I was moaning about months ago regarding wonky font consistency in XMB, though it only works on a per-theme basis of course and may not actually cover everything. ideally, actually seeing why these elements act weird is better but for now the hax will do. I've probably missed a few things - anyone else with an openSUSE tumbleweed installation may feel free to look themselves, because it is seven in the morning and I've been up all bloody night again.

seems like it's randomly pulling from somewhere when generating the actual CSS file to use 11px Verdana - and only 11px Verdana - in certain areas of the board, which I find weird since it's not mentioned anywhere in the theme file.

this also has the result of making certain things look small and ugly on my localhost, where I changed 'big font' (which seems to affect most of the board) to 16px and was zooming in and out of the page quite a bit. the font-size part of this seems to rectify this with no negative effects.

(also why can I make posts containing nothing but a space?)

Is there an appropriate spot for this in templates/css.php ? Perhaps on the html or body element?

I forgot that file existed
I will take a look in a bit and edit this reply

edit: what you said should suffice.

Would you like to add the pull request for this during beta? There is still plenty of time and testing needed.