When I downloaded the .rar links from Rogerfedererpoints and tried to extract them using WinRAR, it said that the CRC failed and the file was corrupt. What's the problem? =/
I also have this problem...
what can I do????? 
First thing you do is Download the file that is damaged again. Delete the broken file and replace it with a newly downloaded one.
If that still doesnt work, download the .PAR files that are in the same download folder.
Download and install Quickpar (
http://www.quickpar.org.uk/)
Once installed, click on one of the .PAR files (make sure the PAR files and RAR files are in the same folder).
If damaged, click on repair.
Then try to extract again.