Sorry if these have been covered, but after going through quite a few threads I didn't see quite these questions being addressed. I know there is a known issue with the 2011 MBPs showing some flickering when attached to an external display via Mini DisplayPort. My first question is, does that include the 27" Apple Cinema Display? Or is it just non-Apple monitors? My second question is somewhat more general-I know that by spec the 13" base 2011 MBP will support running its integrated display in addition to an external 27" Cinema Display (simultaneously), however I was wondering if doing so was a big performance hit due to the integrated graphics. In other words, I know it WILL work, but I was wondering how WELL it works. Thanks in advance!