You did not mention which button you are pressing so I tried this on my 8GB version and no rebooting happened with soft or hardware buttons. Your phone may need to be replaced.

Actually... jeez, it's just doing it ANYTIME I open and close the keyboard now.  Even on the home screen. 

Great.  And here I thought I could 'deal' with DVP problems.. this is extremely bad.  I'm calling Dell today.

typically the BACK key,

But I've discovered that my original understanding of the problem was misperceived.

Today, I open an Excel spreadsheet.

I open the keyboard to type.

Then I close the keyboard.

Then it crashes and reboots.  Its now at the point where I can do it at will.

Just another follow-up and Dell Customer Service just did the typical thing they would do.

First they make you do a reset (which is ridiculous in this case... its pretty obvious the keyboard-reboot problem is hardware, not software!).

Then of course when its still does it, they just send you a replacement... which I'm wary of because what difference does it make if its really a bad quality build?  The replacement will have the same problems too.

I'm glad someone else made a post about this problem, it tells me that it's not just my phone, but an inherent problem in some or all Dell Venue Pro's.

I have the exact same problem, did dell acknowledge this? or were you able to get a replacement ?