It is good to read this thread. I have an '06 XK8. When the roof started delaying/stopping I found the hydraulic reservoir to be low(line leak). Good to know that the F-Type is all electric, but still has hydraulic(water) problems.
If anyone has pix of the various drain holes it would be useful to many of us.

 

Post 17 for the pic. You can see the top but not the bottom (where the rainwater drains to).

At yesterday's car show we pointed out to three owners where they upper holes were. Found leaves and pine cones in more than one.