Many of you have problems with the use of your Samsung Galaxy S phone with tool Samsung Kies.
Here is a video that shows the problem:
Samsung said the problem comes from the phone.
It's here (french translation) : http://translate.google.fr/translate?hl=fr&sl=fr&tl=en&u=http%3A%2F%2Fwww.giz modo.fr%2F2010%2F08%2F03%2Fsamsung-galaxy-s-le-mysterieux-bug-trouve-enfin-une-explication.html
For the phone works with Kies (and remove the MTP application crash), you must simply connect the phone to "USB (mass storage).
Just after, you found and erase all the files more than 16 caracters until Samsung publish a update/fix.
After, Disconnect and reconnect the USB cable and select "Samsung Kies" mode.
If all works, the bug lost... and you can use Kies ! Enjoy !
I hope this tutorial can help you