I don't have another smartphone to know if it is exclusive to iPhone but it does not happen on my 2 laptop computers.
What happened? (font size) - Page 2
Head-Fi's Best Sellers
It's a problem on Atomic as well. What it seems like to me is that the columns are either wider or the font is smaller. I constrain the width to all be the same (have had that as the setting for over 4 months) and I used to be able to read posts holding the phone vertically. Now it's too small and I have to hold it horizontally.