custom font troubles

I am working with some authors and they like to use really nice looking custom fonts. Problem I have is that when I convert these fonts using the online tools, they come out looking bad. I found that if I change the size, the font might look the way it’s suppose to. But if I go one pixel bigger, it makes it look like it’s drunk. It’s all wavy and distorted. Looks like something you might see during Halloween. Anyone got a sure fire method of converting fonts? I have converted them and I am using @font-face which I really like and would like better if the font would look how it’s suppose to at the size the designer put in the psd

What are you using to convert them? I’ve used this once and didn’t notice any issues. http://www.fontsquirrel.com/fontface/generator