You can use tvheadend #0324 and continue updating to newer versions of OE - I'm pretty sure there's no relationship between the backend tvheadend add-on, and the front-end PVR API used by the various PVR clients.
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.
