Yep. Same for me.
I am trying so sync for a month now with no real success
I have tried several workarounds and third party apps (ImproveEmail, Roadsync) but none of them worked well.
I am now back to stock HTC client.
Now emails sync well but calendar is a disaster!
Calendar used to sync 10% of my appointments and was showing SSL error.
Now since I, one more time, deleted account-purged calendar-recreated my account, calendar is not syncing at all (SSL error).
And Logcat is not very helpful.
I spent days on net trying to find fixes or workarounds; many people are complaining, and there is no 'true' fix.
That pisses me off when I see that Windows mobile phone or IPhone can sync with no problem !!!
HTC Desire HD - Android Revolution HD 9.0