Unofficial Shivering Isles Patch is a series of bug fixes that are focused on the Shivering Isles expansion. This mod does not include any fixes from the other unofficial patches. This is mod is considered a must have for anyone that wants to play Oblivion.
The rest of the unofficial patch series are
There are similar series of unofficial patches for Skyrim
This mod is already included in Mythic Dawn: Gateway to Oblivion WIP