CMS blocks disappeared after 1.9.2.2 update

My understanding is that CE 1.9.2.2 includes all the changes from the recent-patch SUPEE-6788, one of which was restrict the blocks that can be used in CMS blocks, pages, emails (etc...) by default.

Fortunately you can whitelist additional blocks through the admin under System > Permissions > (Blocks | Variables)

I used below method:

1. System > Permissions > Blocks
2. Add New Block
3. Block Name: cms/block
4. Is Allowed : Yes

This seems to have done the trick for me.