[SDL] EXC_BAD_ACCESS errors in OSX / related to SDL??

[Stephen Anthony]

Can someone describe some common circumstances under which this error 
occurs for SDL apps in Mac OSX?  I'm working on Stella (multi-platform 
Atari 2600 emulator), and except for some minor system-specific 
classes, the codebase is 99% across all platforms.  Google seems to 
suggest that it's thread related, but since I don't explicitly use 
threads, it sort of falls to SDL.  Here's the exact error:

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_INVALID_ADDRESS (0x0001) at 0x060b1f8e

Note that I can't replicate this on either an Intel iMac or a G5 
PowerMac, but I'm getting users reporting it on a Macbook and a G5 
iMac.  D?!m you Apple for creating so many different 
machines/CPUs/configurations to test.  Note that I've *never* seen 
anything similar on Linux/GP2x/WinCE/Win32/OS2 (the other platforms 
that use this same codebase).

Is this even an SDL error??

Thanks,
Steve