After successful push, all files are listed as modified, uncommitted changes on origin server

Myself and another developer are both experiencing this 'issue'. We will run a local commit and pull (on Macs), then push to the origin server (which is on Windows.) If you view the git status, it will list all files as modified, but I can't pull any details about what was modified with diff. In gitk, it shows all the files under 'local uncommitted changes, not checked in to index', but again, it doesn't tell me what was changed, it just lists the file names in the left column.

I'm thinking it's an OSX file browser process that is modifying the files' meta data when git is checking the repository. It is not affecting our workflow, but it is an annoyance. Any info that can help prevent this would be appreciated.