When driving to Copenhagen last week I noticed some difficulties (or wrong behavior) when using my TomTom CarKit for iPhone. I have swapped from iPhone 3Gs to iPhone 4 lately and because the new design of the iPhone 4 (Thinner than 3Gs) it did not recharge battery through the CarKit.
At the Norwegian TomTom Forum I became aware of the easy velcro (Borrelås) fix.Off I went to a shop for zip, ties and other accessories (Tjorven at Majorstuen, Oslo) and bought 10cm of velcro for 5 nok.
I only needed one cm and cut the velcro in two, making it doble and placed it at the place recommended in the video by engadget.com.
IT IS Working.