Why is my text changing size randomly

A little disclaimer before I get ridiculed for not putting up code examples: I would have to put my whole site开发者_JS百科 on here so there is nothing really specific except a combination of PHP,CSS,JAVESCRIPT,and XHTML that creates 70 plus pages

Basically I am just looking for a guess on what it could be making my text change sizes randomly. I can reload the same page and it could be the same or change

Any idea of what might be happening?

No guessing necessary. Install firebug, right click the text, click "inspect element" and find out exactly why. :)

Do you atleast have a URL that you can point to so we can see it for ourselves?! Without some point of reference the only feasible that could be given is "because you're doing it wrong".

Perhaps a stylesheet that affects the font size sometimes loads and sometimes fails to load.

(Stylesheets are usually static and therefore can be cached, so this would be a symptom of an underlying problem with your site.)