A solid yellow border is not being used by the module... it uses a dashed yellow border, and a dotted yellow border. I am guessing you are using IE which seems to have some issues with the CSS and styles. A reload may help, otherwise all I can suggest is that you try the latest bundle of 1.3.1 (which has a small fix that may help) or use FireFox, although IE7 is probably okay also.
Done... will slow down the creation of the page slightly.
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