Hardware :: Could The Macbook Overheat While In A Sleeve

I am about to pull the trigger on either a booq Taipan Skin S or the Vyper XS2. I have an Aluminum 2.4 Macbook. I usually sleep my MB overnight and when I'm not using it, I usually shut it down about twice a week, but in the mean time it sleeps. Can the MB overheat when it's sleeping in its sleeve?

The only reason I ask that question is because there was a disclaimer on the Booq Vyper XS2 page;

Quote:

Note: The surface of the MacBook is sensitive and discolors easily. In special cases, when the white MacBook has been left running for an extended time in the Vyper XS2, discoloration can occur. Apple expressly advises that you work on a surface with adequate airflow because the MacBook gets very warm during normal use. When warm, avoid working on dyed surfaces, because of potential discoloration of the lower surface of the MacBook. We do not take responsibility for potential discoloration of your MacBook.

I think they mean specifically for the old white and black MBs, but I was just curious. Has anyone had experience or heard of MBs overheating while sleeping in their sleeves?

And besides that, does anyone have experiences with either of these sleeves? I've heard good things. I'll put it in my backpack, so I'm deciding whether or not the extra $10 is worth it for the Vyper over the Taipan.