Vapor barriers and drafty wall outlets.

Two questions here.
#1. I was hanging a curtain rod outside wall in our living room. Drilled a hole in the drywall so I could put in an anchor for the screw.. In the process i drilled a bit to far and punctured the vapor barier. I tested by poking a long nail through the hole in the drywall and there is definetly a thick plastic sheet back there with a hole where i drilled. Is a single small hole like this a problem at all?
#2. We were painting an inside wall (it connects perpendicularly to an outside wall) and I noticed a slight draft (cold air coming through the outlet into the room) when i was putting the faceplate back on an electrical outlet. The outlet is about 10 feet from the outside wall. Is this expected? If i can do something to help fix this... what?
In my constant quest for energy efficiency I'm never sure if the things i worry about ar extremely minor little things that really won't help even if i fix them.
Background: House is new, built in 2002. Near Toronto Ontario Canada.
Our basement is unfinished. The walls consist of studs with pink insulation between them. Then a thick plastic sheet has been screwed into the studs from floor to ceiling. I assume that same type of vapor barrier is upstairs in my question #1 even though i've never seen inside the wall to know.
Any thought appreciated. Kevin
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There are foam pieces made for weather proof boxes. Your going to play heck finding just them for a bargain. I believe I saw some in an Ace a while back. My googled got this http://doityourself.com/store/switchandreceptacleplate.htm
Air movement is common in walls. My interior walls do the same thing when it goes warm down here 40+C.
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SQLit wrote:

If the house is that new, the outlet boxes should have plastic sheet shroud installed before drywall went up. That hole you punctured can be sealed by sqeezing in a dap of sealant. Foam pads to go behind the switch or duplex plate does help. They're cheap. Is the vapour barrier joint are pasted together with sealant? Tony Calgary

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