After installing django, and running with apache, next error could appear:
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It is possible that actually you browser isn't configured to accept cookies, but it is also possible that your apache server is running with PHP support with mhash module enabled; then it is an unsolved and known issue.
This issue causes python md5 module to get unexpected results, when executed in same apache server than mhash PHP module. Here it is a more detailed description.
It seems to be no solution for that (just uninstall mhash module, or whole php support if possible).