@Mafarricos: A debug log(wiki) of the library scan would be helpful. Going back through the builds to find the last working version would also be very informative.
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.
