Yes, yes, yes, yes I have had exactly the same problem.
Have tried uninstalling ActiveSync, deleting directories, running registry cleaner, soft reset, hard reset,etc. etc. I returned the machine to supplier and they checked the cradle (it checked OK) and suggested using ActiveSync 3.7. It worked! So got everything loaded and set up - fantastic all brilliant.
Guess what happened about 5 days later? Yes the same thing - now I have a completely useless £450 machine.
Come on HP what is happening? you have a real issue here.
Am getting a USB sync cable in next few days will keep you posted on if it has any effect.
Trog Tuite
...a few days later - got the USB sync cable - EUREKA - it worked straight away - just doing full restore now - so yes I would say there IS a problem with the cradles - spoke to HP and they are sending me a new one as well