That visual C++ error that keeps popping up ever 10-30 minutes without warning is really starting to tick me off... started happening around "Beyond Death" just before you encounter the dragon and then started becoming more frequent towards the end of "Touching the Sky" and after the main quest-line. The glitch is absolutely random to the point I just gave up, disabled Dawnguard, loaded an earlier save (in which Dawnguard was not started/downloaded) and what happens? Nothing except for an excellent running vanilla Skyrim with not one crash for about 5 hours now.
Please Bethesda, fix this rather annoying and game breaking glitch, we payed so we expect results.
Edit: Not to mention I really enjoy this DLC considering...