POBLEM WITH iTUNES 8

Hello,
HAVING TROUBLE WITH MINE TOO...I DOWNLOAD IT BUT I CAN'T INSTALL IT WHEN I TRY TO IT SAYS THAT THERE IS A PROBLEM WITH THE PACKAGE.....The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2738....THATS WHAT IT SAYS..DOES ANYONE HAVE A CLUE ON WHAT SHOULD I DO.