No Magic Trackpad taps, clicks, or combination will get me the contextual menu since I upgraded to Lion. I want to kill it.

Question

In Snow Leopard, the magic trackpad was a thing of beauty. tap to click, swipe with three fingers to navigate, two finger tap for contextual menu.  Horizontal scrolling just an evil threat, easily opted out of.
Now that I've upgraded, well, three fingers will still navigate me around Safari. And I was able to correct the truly disorienting "natural scrolling" and get the words moving back the right way again.  But no matter what I do, or what I select in Preferences, I have no more right-click equivalent. I've tried deselecting and reselecting, changing the number of fingers, choosing a bottom corner click option... still no contextual menu. Instead, I get the dashboard widgets. 2 finger tap: dashboard widgets. bottom right, or left, click: dashboard widgets.
I've tried a fix some folks have posted that involves adding a line in Terminal (defaults -currentHost write -g com.apple.trackpuad.enableSecondaryClick -bool YES) and then logging out and in. Many have had success with that. I have not.
As far as I can tell, I have now far fewer options and less flexibility with the trackpad in Lion than I did in Snow Leopard.  More animation to tell me about them, but less functionality.  That said, I'm guessing there's a bug here. Can anyone help me fix this thing?  Bonus extra points if someone can tell me how to un-choose horizontal scrolling!

Answer 1

So, Darrall, it seems to be fixed.  Mind you, this has happened through a seemingly unrelated, but hopefully replicable sequence of events.  You be the judge.
I went to my other login account, which as it happens is also an admin account.  Voila, the secondary click worked fine.  So I returned to my primary account, where I did the following:
First, I unpaired the trackpad.  then I remembered I needed something to move the mouse with, so I re-paired the magic mouse I'd had before.  I thought I'd turned off the trackpad, but apparently not, so the computer re-paired it automatically. None of this had any immediate effect, as you'd imagine.
Then I went to Mission Control in Preferences. There, I deselected "Show dashboard as a space", and in the hotcorners, I deselected Mission Control from the bottom left, where it had been. I didn't replace it.
Now, my secondary click works. Uh huh. I was suspicious that it might have more to do with Mission Control and/or Dashboard than the trackpad, only because I'd beaten that horse till my arm hurt and this was all I could think of. 
Never did I imagine this would get fixed short of creating a new login account and somehow copying everything - since I didn't know what was wrong, I could easily have copied the error too - so I'm very pleased and relieved.  If you haven't fixed yours yet, try this.  Let me know what happens!