The font sizes are screwed up in Safari on iOS. At 100% the font is too small on my phone but at 115% it's way too big — double the size of the font at 100% — and the line length is too long and doesn't wrap to the screen.

I like the minimal design and low page weight, but the markup is archaic: nested tables instead of lists and CSS (but strangely enough replies are not nested in parent comments). It's light weight but could be leaner and cleaner.