I noticed a "problem" with using Git and Eclipse workspaces. http://twitter.com/IQAndreas/status/52053104027385856

If you don't include the hidden project files (.project, .settings etc) with the commit, switching to another branch will cause the project to "implode"; as the required project files disappear, Eclipse realizes this is no longer a valid project and closes it.

Instructions

• Using the command line, checkout the project starting on the branch branch (make sure the .project and .settings files are still there)
• Switch to the master branch from inside of Eclipse (I used EGit). The project should close when the .project and .settings disappear.