28
Try this:
Go to system admin/template manager/
Go to the now cloned and default template. See where it says system. Click on list. You should be taken to the list of templates for the system module. Delete the one that says "system_block_dummy.html". You will be asked to confirm the deletion. Say, yes.
The page will reload, with the system_block_dummy file highlighed in yellow. It will have a link to generate the file. Click on that link. It should create the file
Now, delete everything in the templates_c directory.
Your blocks should appear. Assuming that that was what your request was so long ago...
MMM...It tastes like chicken! 
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