Help... I have a convection oven and my cupcakes are coming out with the tops slanted or buldging out one side of the top.. ??   I have started turning the pan around after 5 min baking time.. but still seams a bit slanted... any advice??

ACan you adjust the fan speed? Its blowing the batter.

If you can't adjust the fan speed, you could always try to put some kind of shelter round the sides of your tray to keep the draft out.  I'm not sure how that would affect the baking times, though.

Here's a few threads about the problem, if you want to sort through the advice.

http://cakecentral.com/t/733438/i-need-help-quick-lopsided-cupcakes-in-commercial-oven

http://cakecentral.com/t/716655/fan-assisted-oven-night-mare-plzzzzz-help-me

http://cakecentral.com/t/737211/i-thought-convection-ovens-were-supposed-to-take-less-time