I'm aware that there is/was a problem with the text on Macs, but I seem to have been the only person on Windows to experience a text-related issue... I got the chat bubble issue that Macs have, and everything was 2x (or so) larger than it should have been. I also couldn't see the text on the map completely in Firefox. (I attributed that to an add-on I have installed: Theme Font & Size Changer. Chrome seemed to work better for me, anyway.)
Wow, I wasn't sure how to fix this but that screenshot basically told me a way. Thanks. I didn't know they became visible when they were full (red). Changing the font colour might just do it, and if that doesn't work the ink!