Oblivion's first expansion Shivering Isles may be suffering from a bad case of the bugs. Over at the UESPWiki they've outlined a potentially crippling bug confirmed in the PC version of Shivering Isles that may also affect the 360 expansion. The bug revolves around the amount of identification numbers for in game objects exhausting causing newly created objects to disappear. And since this bug is based on the amount of time played and the FPS, the Xbox 360 version would produce the bug around 150 hours of gameplay. The Elder Scrolls community found what caused the problem and created a patch for the game, but Bethesda has yet to release anything official on the PC or 360 side of things. Though, there are a few work-arounds for each version listed in the wiki. So, have you played over 150 hours of Oblivion with Shivering Isles downloaded and if so, are you experiencing any wackiness?