I'm not aware of any changes between 1.x and 2.x that would corrupt a repo... I use a mix on various systems, some even still have git 1.7.x on them. The only problem I run into is when you have some script that depends on a newer git feature added in a newer version...
My money would be on Dropbox busting your repo somehow. I don't think Dropbox is an ideal solution for pushing/pulling git repos from.
My money would be on Dropbox busting your repo somehow. I don't think Dropbox is an ideal solution for pushing/pulling git repos from.