I've never had much trouble with other game engines which didn't get fixed (think GTA IV, which was actually probably my only problem in the last couple of years)
questviewer seems to dislike everything from graphicsettings to proximity to missionlocations (next waypoints) and thumps into other ships (singleplayer with the jetski and other vessils which should result in about 3-4 % damage but just crashes my game..silly)... even had the thing "crash on me" whilst simply exiting the program. Reinstalled about 5 times total, last two times using Terry's flowchart, still encounter crashes... there's only as much you can do to maintain a stable system, and i cant say that i've tried "everything" as i'm either not capable of it, or simply dont feel the need for it. As for questviewer beeing the most stable program out there for the most common computer... i'd say.. nope!
So.. for amatuer scientific research i used google.. and simply google'd :
"Questviewer Problem"
and
"Questviewer solution"
now i might not be the best in finding catchphrases for google.. but these two different words found different results...
and not really in it's advantage. Damaged amongst the scale of 3:1
But i guess that's normal for every problem in any engine as i've never researched them for it either.
(just guessing that most researchers dont either, as the results of most investigations i hear of are not really bipartial anyways, so in that respect i think i did it right)
Regards,
Steiny
Edit: Best of luck on your quest, viewer.