MemoryStick PRO Duo card with HDR-TG3E

[younso]

I am heading to Australia for a month in the summer. Just checking my trusty HDR-TG3 camcorder that still delivers really good video and noticed that when I slip in my Sony Stick PRO Duo 16 GB card I get the following message on the screen.

Funny enough it still seems to record correctly. What is going on? Can I trust the card on the summer’s trip? I have a 8 GB card that works perfectly but at the highest quality recording that one will only give me a total of just under 60 mins, the 16GBG card will give me an additional 120 mins.