Remove Security Door

I moved into a new house in July and most of the windows in the house are developing cracks between the plastic window sash and the wood frame (painted white). There is considerabe heat loss through the cracks. I am trying to determine if these are defects in the window construction or normal settling of the windows. The wood frame came already installed with the window so all shrinking should have already occured rpior to installation. You can see a picture of the crack at [url]http://home.cogeco.ca/~iota/insidecrack.jpg[/url] Has anyone ever experienced this?

I recently (summer) installed a new sliding glass door from Anderson. I liked the look of the door and it had low e-glass, etc. But, now that we've hit winter in Buffalo, I am noticing something strange occuring with the door. Last night, there was a big chuck of ice on the inside bottom of the door near where it seals to the jam on the sliding door. This suprised me as I thought by spending the $800 for the higher quality door, I shouldn't expect to be pulling off chunks of ice from the bottom of the door. At the bottom of the door, there is an aluminum sill that gets really cold. This sill is freezing compared to any other part of the door when temps drop. My thoughts are that because the aluminum is a good conductor of heat or cold in this case, the low temps that we have been having (1°F) are being brought into the house via this aluminum that goes under the door and is exposed outside. Now, because we have a humidifier on our HVAC system (see recent thread about moisture on windows), we have a moisture build up on the windows which trickles down to this sill which remains at close to outside temperatures (below freezing). Creating ice. Does this sound right? Why would a door be designed to have a sill that brings in such extreme conditions? Seems they should have redesigned the sill and use a material that was less conductive to these temps or put a break in it with different material...something!! Is there any fix for this? Could I have missed something on my install?