Hi John, This is a limitation of the current version of Flash that is integrated in Google Chrome. There are 2 solutions (until this is fixed in an automatic Chrome update):
1. Try another browser when you need to use large font-sizes (Firefox, Safari, Internet Explorer etc) and if you still have a problem try updating flash.
2. Or, you can alternatively disable Chrome’s internal Flash player so that it uses the system Flash player.
If you still have a problem please let us know.