Standard font size John. It seems to happen on whatever computer that I own ie a 17" and 11.6" laptop and a 22" desktop. What are your settings? When I load any other website on either IE or FF, the desktop resizes/wraps automatically when zooming. Vegas web page doesn't.
"Zooming", there's the key. The forum software used here seems to be hard coded to fit in a 1024-wide window and ignores the physical area of your screen. When you "zoom" you're probably using a function that increases the size of the image on the display, rather than increasing the font size itself. If you want the text to be larger try going to My Account / Preferences / Font Size and change it there. That will allow the forum software to use larger characters and still fit them in it's 1024 window, wrapping as necessary.