The usb port nightmare continues for me. After six months that I had mine replaced and tightly secured in place, my N900 started to behave abnormally when charging. The charging led worked only for a few hours, or minutes or not at all. The battery icon in the status area however was in charging mode, with or without the led on.

I brought it back to the same repair shop and they said that one of the usb pins, obviously the charging one, was broken and they had to replace the entire port, again..... I was quite gentle when plugging/unplugging it though, especially after the first repair. I am not sure how this could have happened. I admit I was and still am afraid to send it to Nokia Care shop, ever since I read all these posts about people receiving a different phone back from Nokia.