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Well first it contains all the fixes through all the previous patches, but all the patches have been that size, and the reason I believe is because of the copy protection. There was some issue with the games copy protection doing it's job to protect the files that some of those new updated copy protection files HAVE to be included in every patch, in order to actually patch the game!!
Also the patch contains a lot of fixes for the battlefields (from all the previous patches) and I think the files for each battle field is about a meg or so in size. So they raise the size up a few megs too!
