I had to do a certain misc. quest on the vampire side that ended up having all of Markarth chasing after me. I fled, running all through the Reach, in daylight no less, and the game constantly was telling me I was being pursued by guards, even though I never saw them beyond the walls. I get back to the castle, turn in the quest to Feran, who is sleeping down in one of the coffins. On my way back up, I pass through the dinner hall. You know, where there are a handful of vampires eating live thralls on the tables, no big deal. And a Markarth guard comes strolling in like he owns the place, demanding that I go quietly. I stared at him for the longest time, not really sure what to do. Then decided, why not? This man obviously has no fear of a castle filled with vampires and was quite determined to bring me in. He deserves a reward. So I went to Sidna mine and did my time.