So now with dawnguard instead of a thief apearing in Riverrun and getting attacked, a Master Vampire and 2 Death Hounds appear. Well my riverrun is now a ghost town pretty much. I'm guessing this will also happen with Rorikstead and the mining towns aswell seeing as how the 3 town guards could even manage to take down a single hound what chance do the villagers have with iron daggers.

These random occurances should be scripted to appear only outside of towns.

Agreed. I don't even know if I should buy Dawnguard right now. I might, I usually play one time playthroughs anyway (meaning I only do certain questlines, then ditch the character). So this problem shouldn't give me too much trouble.