Burgertime - Why Does it Crash?

[Tempest <tempest@atariprotos.com>]

Ok this has been bothering me for some time now.  Why does the disk
image of Burgertime that is floating around crash after the title
screen?  I've tried all the different versions out there and they all
do the same thing.  The odd thing is that I remember playing this as a
kid and it worked just fine (joystick hack./cracked by the Freeze).  I
even have my original disk and IIe setup from back then, but now it
crashes!  I tried it on my IIgs and got the same results.

The only thing I can think of is that one of the cards in my IIe/IIgs
are causing it to crash.  I have a few more cards than I did as a kid
(a mockingboard and an Ethernet card) so could that be causing the
problem?  Anyone actually get this to work on their setup?  I loved
this version of Burgertime and I'd really like to play it again.