Corrected entry: After Buffy rises from her grave, her face is surprisingly clean for someone who just climbed through six feet of dirt.
Corrected entry: In the opener of season 6, Buffy has to dig her way out of her own grave because the others were driven away before they could finish the spell and don't know she's alive, but what were they planning to do if they had finished the spell? They had no shovels to dig her out, so were they planning on bringing her back to life then letting her asphyxiate in her grave?
Correction: They accept later it was a badly thought out plan.
Correction: Not so much a mistake as consistency - new vampires are oddly pristine as well.