One thing I find consistently disturbing about the way printing shows up on web forums is that it's hard to perceive the customary double-space between two sentences.as being much of a physical division. The period is usually a tiny speck, so it doesn't, by itself, do the job of separation. Another thing that looks bad in many typefaces is the customary no-space between the end of a question and the question mark. The question mark seems to be a character that's part of the last word instead of something that applies to the whole sentence. I wonder if reading web pages is usually a fundamentally different perception task that reading printed matter. I suspect that compared to printed matter, reading a web page requires reading smaller printing that surrounded by more distractions.