Hello Properez. I had this same problem on several sites I did and it turned out to be due to the text/para justification. I had to change all the sites from FULLY JUSTIFIED to left justified. When the site was fully justified, the text would remain stable if I did not have any links or bolds in the sentence. As soon as I had either of these the text would bunch up, and sometimes would even change font to times new roman (a font I detest!) and around 16 to 18pts! Now that I have left justified all the sites the problem seems to be rectified. If you haven't fully justified the text on your site then this ramble won't help you much at all. Good luck!