Changing themes resets the font size, and apparently sometimes doesn't change the font size in the message listing.
I use the wave icon them. See the thread on having fun to see what it looks like.
Originally Posted by peznut
cool papa: my font/size settings in Settings>Options affect my e-mail/SMS messages when I view them. However, I have noticed that the message list in certain themes I've downloaded remains unchanged by those settings - but in all cases, each actual message displays in my font/size of choice...