In my development setup using Django 1.4.x and PyCharm 3.0 on OS X Mountain Lion, I've encountered an issue with editing JavaScript files within the Django apps located in the src directory (under External Libraries in the project browser). Regardless of file permissions or origin, I am unable to make changes to these files within PyCharm, whereas other editors have no problems accessing and modifying them.
I have attempted to lock/unlock the files from the lower right corner options, but even though the JS icon on the tab at the top displays a lock symbol, any attempts to interact with it prove unsuccessful.
This problem is not isolated to just me, as my coworker is also facing the same challenge.
While I have been a long-time user of PyCharm for 2 years, the recent upgrade from version 2.x to 3 seems to have triggered this issue.
List of Django apps located in my src directory:
beanstalkd
coffin
django-account
...
south