htmlText + readability

I have a problem with this combination. A html textArea, a simple link formatted with css:

a:link {
    color: #95B23C;

    text-decoration: underline;

Here is the link to a test file: Just rollover the link from the last sentence. You can see the text moving around the first time you rollover.

It only happens if I export the text for readability. If I export it for animation, the problem is gone but the text is not very readable. Do you know any fix for this? Or where should I search for the problem?
I was thinking about generating a hidden mouse rollover effect that would rearrange the text. Is this possible?