You really haven't given nearly enough information for us to diagnose anything. You didn't tell us the specs of your clip, your Sequence Settings, your monitoring method...
I assume the text is jerky. Where are you seeing it? In a movie-file output? On a website? That could be a frame-rate issue, it could be a compression issue. Some websites try to offer camera stabilization at the upload stage, and unless you turn it off, it wreaks havoc on graphics and framing.
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