Bethesda claims that Skyrim runs on all new engine called the 'Creation Engine', but as the bugs found in the Fallout games and previous Elder Scrolls titles return for Skyrim, it suggests that either it's not a whole new engine at all, but rather a modified Gamebryo engine, or Bethesda are extremely incompetent when it comes to creating an engine.
We don't mean to sound so harsh but something is up here. The same stuttering problem that appears in the PS3 version of Skyrim first appeared in Fallout 3, then again in Fallout: New Vegas. Bethesda have suggested some workarounds like turning off auto-save and clearing some space on your hard drive, but that just doesn't cut it.
It's clear that the engine is getting old and bit creaky, and as it's riddled with bugs, so how about a whole new, not broken, engine for the next game? We can wait while you make it, Bethesda.