Update: This bug has been fixed in the latest version of Chrome (v11).
I stumbled upon this recently while creating a breadcrumb using the <dl> element. I needed the first <dd> after the <dt> to have a negative margin, but for some reason the negative margin got applied to all the <dd>'s in Chrome.
In the following example the first <dd> should be red while the others should be green.
<dl><dt>Definition Term</dt><dd>Definition Data 01</dd><dd>Definition Data 02</dd><dd>Definition Data 03</dd><dd>Definition Data 04</dd><dd>Definition Data 05</dd><dd>Definition Data 06</dd><dd>Definition Data 07</dd><dd>Definition Data 08</dd></dl>dt{color:blue}dd{color:green}dt + dd{color:red}