Go to the Minefield "Text" test page. Navigate to the paragraph that reads:

"This is a paragraph. It has a few sentences in it. Can you read it well? Sally sells seashells by the seashore. Areallylongword exists in this sentence to see how it might confuse the user agent. The following is an enormous paragraph."

Use down arrow to move through the lines in that paragraph. While the last line is still being spoken, press down arrow again to move to the paragraph below it. Notice that the last line output does not get interrupted when the key is pressed. The entire line is read before the start of the next paragraph is read.

This is not the only place this bug occurs. It's the simplest example I could find though.