Thump When Changing Gears

[cpsp1976]

I also posted this on the tech forum, I hope nobody minds me posting in both places.

I got an 04 Boxster about a week ago and recently noticed that I am getting a thumping/thuding sound when switching gears at low speeds. I noticed this for the first time on Friday which as the frst time it had rained since I have had it. It was also the first time that I had it in traffic so I do not know if the rain is playing a part in it or now. Does anyone know what this might be? Should I be worried?

[coreseller]

You might want to run a search for motor mount replacement, that is what my first inclination would be.