"Permissions Differ..." - what does this mean?

My MacBookPro won't boot except in safe mode.  When I run the 'Verify Disk Permissions' process, I get a list of 'Permissions Differ on...'   Can you tell me what this means?  I have clicked 'Repair Permissions', but the same list returns next time I run 'Verify Disk Permissions'. 

Verify permissions is just that. It checks if they are ok, but does not fix them. You need to do a "repair permissions".
While bad permissions may cause trouble, I suspect that there may be more to it than that.
If you have 10.6.8, as your profile says, boot your mac using the Snow Leopard DVD and run Disk Utility from there and do a Repair Disk as well (this will test the integrity of your drive's file structure). If you use Lion or later, do the same using the "recovery partition" that these systems install on your drive (hold down the option key at startup to choose a different startup volume).

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