Did about 36000m on my 750SS before it met its end at the hands of White Van Man.
Can't remember any major probs except that I managed to bend a valve somehow very slightly ("missed" gearchange?). Despite it being 6 months outside warranty, I managed to get it all replaced FOC with the support of the dealer (the late lamented Merlin Ducati in Cardiff).
Neutral light switches, I had a few (never a prob on the 748, though).
Paint lifted quite badly on the LHS engine casing (it was a half-faired model, and used all year round).
Original clutch was still going strong at the time of its demise. They're not as sweet as the dry ones, though, anywhere near. Whether that's the clutch, or the gearbox I don't know. But all wet-clutch Dukes I've ridden have seemed a bit clunky to me.
Not "Honda" clunky, of course, just a bit...
[Edited on 22-9-2004 by moto748]