Hee, haw! Well, whilst trying to figure out this instruction, I stumbled upon the text size button under "view" in the main toolbar. Hitting the next to smallest size got everything in order. Whoo-hoo!
---------- Post added at 12:49 AM ---------- Previous post was at 12:47 AM ----------
Needs a little fine tuning, though- the reply window is readable, but the posts above are now a little too small. It's workable at this state, however- I'll just adjust text size as required.