Update: clutch has another 8,000 miles on it, still acts weird and unpredictable as far as where the "grab point' will be until I take off a few times.
I have this exact problem...kinda frequently too. The clutch lever feels 'soft' and requires a full pull into the handle (from where I have it set anyway) to disengage the clutch. If it's really soft, the bike will jump ahead when putting it into gear the first time. All becomes right with the world after a mile or two down the road and a couple cycles through the gears.
Haven't really explored any fixes for it yet. Sounds like the problem is more common than I thought.
Mine does that but only when it is hot and has been sitting for a while but not long enough to cool down. When the bike is at running temp. or cold, the clutch engagement point is the same; when it is hot and has been sitting for a while, say 20 minutes, the clutch engagement point moves toward the handlebar quite a bit. The slave cylinder was replaced and it cured the problem for a while but it is back now (maybe 15K miles since the slave cylinder was replaced).
It seems very repeatable and <more or less> normal. I will change my clutch fluid and let it go at that unless or until there are other symptoms. The clutch itself works perfectly so it is nothing to worry about IMO, and there are 62K miles on my bike.
Brian