Infinite Theme Fallback Fix
The Magento 1.14 Enterprise and 1.9 Community editions introduced a new theme fallback structure (explained in depth in my Classy Llama blog post An In-Depth Look at Magento Theme Fallback) which enabled developers and merchants to define infinite levels of theme fallback.
This powerful new feature currently has a crippling bug which prevents layout XML update files from all levels from loading, as described in my blog post Magento Infinite Theme Fallback Fix.
As described in the same blog post, the module fixes the layout XML update loading in a robust manner and without requiring the use of rewrites.
Where to get it
The module can found on github: https://github.com/ericthehacker/magento-themefallbackfix.
As always, I welcome feedback, issues, and pull requests. :)