I have an 02 ZX3 at 36K, no problems at all with clutch.
If the dealer denies warranty repair, call Ford Canada. Tell them if they don't fix, you will mail every newspaper and write to every forum you can with the problem.
Check the fluid that is leaking -did the dealer use the right fluid? Most dealership mechanics have little experience with manual transmissions.
Aside from that, check other area Focus owners, it might be a cold temp problem , Winterpeg sees problems that the rest of the world rarely sees in cars due to the extreme cold.