I had very similar problems recently.
I've replaced the clutch slave piston (which was leaking slightly), greased the pushrod, replaced the pushrod gaiter, renewed the fluid and bled the system (twice). The pushrod at the pressure plate end had obviously been binding somehow as the hole in the slave cylinder piston had been machined by the rod spinning in the hole.
All working fine now
BTW ~ I bought a really good gizmo bleeder thingy on eBay - all it consists of is 3 or 4 syringes and some tubing, but for £4, its halved the time taken to do the job as it enabled me to reverse bleed the lines by sucking fluid through rather than pushing air out
I'll find the link and paste it up.....<edit> that link is for a 749 kit, but it may well be the same, if not, check his other items.
http://cgi.ebay.co.uk/DUCATI-749-DAR...cm dZViewItem BRB