Will 'Double NAT' cause any problems for me?

Hi there
I have just received a Netgear VMDG280 Cable/ DSL modem/wireless router from Virgin Broadband in the UK and I plugged it into my Airport Extreme 802.11n base station. The internet works fine but the amber light remains flashing, warning me of a Double Nat error.
I can easily select for my Airport to 'ignore' this Double NAT error message, but am worried that by ignoring this warning, I might compromise something important in my whole broadband set up. Could it also reduce security etc?
Essentially, Im not doing anything fancy with my wireless network, besides running a Macbook Pro, Iphone, Ipad and friend's laptops etc.
With Double NAT existing on my network, will this affect the service I will receive in any way? Or can I just put it out of my mind?
Many thanks
Dan

+If I operate Airport Extreme in Bridge mode, will that mean that the technical quality and security of the Airport Extreme base will be bypassed in favour of the Netgear?+
No
+if the Netgear is classed as the lesser device of the two, shouldnt the Airport Extreme handle the more important tasks rather than being a passive 'bridge'+
The Netgear is already configured as the "main" router on your network. It is what we call a "gateway", a combination modem and router on the same chassis. The AirPort Extreme does not include a modem, so if you wanted to make it the "main" router on your network, you would need to purchase a separate stand alone modem and then set up the Netgear as a "bridge". That gets really complicated.
If you are seeing no adverse effects of the Double NAT, you can choose to "ignore" the message and the light will turn green. If you want to do this, open AirPort Utility, click Manual Setup, and then click on the word "Status" on the summary page. Click "ignore" regarding the Double NAT.
Networking rules specify that you should try to avoid the Double NAT situation if possible. On a simple home network this is not usually a serious error, but it can slowdown internet browsing. If you plan to add a gaming console and want to play online games with other people, then the Double NAT will probably prevent you from doing so.
My suggestion to place the AirPort Extreme in bridge mode was just that...a suggestion. If you are happy with the performance of your network now and simply want to get the light to turn green, you can choose to "ignore" the message.

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Will 'Double NAT' cause any problems for me?

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