Hi all! I have a 15" 2012 Macbook Pro (regular, not retina) with a slight issue. As part of my weekly Mac maintenance, I run a disk utility permissions and verification scan on my internal hard drive (750gb Seagate Momentus XT). After upgrading to Mavericks, I noticed that after I while my disk had errors. They were all incorrect block counts, for different files. Thinking it was a software issue as a result of the upgrade, I reinstalled from scratch. Though I still received those errors sometimes upon a disk scan, there were no other consequences. However recently, there has been a few beach balls here and there, so I ran another disk scan. Lo and behold, another incorrect block count. The SMART status is verified, and otherwise it runs well without any unusual noises. So, is it likely to be Mavericks or my hard drive? Thanks!