weird caracters in URL

Hi,

I'm etting some weird ends of url on my website...
You can check it out here: http://acousticsamples.net/keys/kawai-ex-pro

And it will display: http://acousticsamples.net/keys/kawai-e ... K3fAeMSWMI

It is always something that starts with #.

Any link will do the same, anybody has an idea why and how i could get rid of this?

I'm on opencart 1.5.1.3 with SEO on.

Nevermind, i just found it... the addthis plugin is doing it...

I found the solution here in case it happens to somebody:
http://support.addthis.com/customer/por ... ers-in-url