I should note that I'm playing dead is dead with no excuses so to have to restart to this really got to me. I don't think its possible to finish this game without dying to a bug but to lose it at level 6 was annoying.
Starting again.
You are very welcome. I feel your pain and understand your frustration. I am glad you are continuing with Skyrim.

Merari, has a good point about the Couriers. I have not experienced this with them but once. I see that they could be frequent. And yes, there is hope this is addressed by Beth.
Now, about your game. We have a thread devoted to DID here. http://www.gamesas.com/topic/1372771-the-skyrim-dead-is-dead-thread-vii/ You can discuss mods, the DID playstyle and general gameplay there. We have a growing memorial for the fallen.
As far as restarting due to a glitch. I see no reason to forego that route. There is no shame in reloading because of a glitch or outside influence. I feel dirty if I reload because I fell off of a cliff or let my character die from my own stupidity, but to restart because of something that is beyond your control is.....you get the idea.
If the game lock up and crashes, you restart...right?
EDIT :
On PC it's TAB (Character Menu) button. Works well for me at least.
Edit:
It should be B on Xbox and O on PS3.
You know, this brings up a good point. That function does exit dialog, but not always. The forced dialog of "some" NPCs will not allow you to exit. Even by hitting "B" or even "X" or what ever to advance through dialog. You must wait for them to stand there and listen to all the bla, bla, bla...
But I am now not 100% sure that all "forced" dialog is that way. It seems that some may still be either advanced or exited. I mat be mistaken.