Dreamweaver squiggly red lines

[user9]

When I open a CSS file in Dreamweaver, some code segments are underlined by squiggly red lines. What's the reason for this? I can't find anything on Google. I originally thought it might be an error, but I even get squiggles for the following code:

.borderRight { border-right:1px solid #000000; }

In addition to that, in the html file

<link type="text/css" rel="stylesheet" href="sample.css" />

href="sample.css" has a squiggly underline.

Does anyone know why this is?

Thanks in advance

[user9]

Nevermind, I found why the squiggly lines were appearing.

Squiggly lines indicate errors and some tags not supported by certain browsers.