I just got a Samsung Galaxy S Vibrant and I absolutely love it. However I hate Kies. I have been having issues with connecting the phone via USB. After installing Kies, the first time the phone successfully connected and I was able to transfer some music to the phone.
However when I tried to connect the phone a second time I got an error on the phone that the MTP application had crashed and I was forced to close it. After which the phone's screen would flash between the home screen and the MTP application, similar to the following video on Youtube:
YouTube - Samsung Galaxy S PC connecting problem with Samsung Kies
I contacted Samsung support on this issue. They immediately responded back and said that if I was running Windows XP and Media Player 11, I needed to follow some steps to remove Media Player 11. I have attached the instructions to this post
Unfortunately for me I am running Windows 7 Home Premium 64 bit. I responded back with this information and they confirmed that the only work around is to format the internal SD memory card before connecting to the PC. They are working on a firmware update to resolve this issue.
So to connect I have had to do the following:
1. Go to Settings and select the SD Memory option
2. Unmount the internal SD card
3. Format the internal SD card
4. Connect the phone to the PC
Hope this helps people