I create a Django project with PyCharm and then I move it in a Mercurial repository (for .idea directory files I follow this instructions http://devnet.jetbrains.net/docs/DOC-1186).
Than I clone the project in another computer and when I open it with PyCharm the toolbar "Select Run/Debug Configuration" combobox is empty.
I try different things but I can solve the problem only removing .idea/<project name>.iml file.
Note that things go wrong even if the original <project name>.iml is equal to the one created by PyCharm itself.
Sorry for my English and thank for your help.