Also, STAssertThrowsSpecific does not work with non-NSExceptions.

Out of curiosity why are you throwing exceptions that don't inherit from 
NSException?

http://developer.apple.com/library/mac/#documentation/cocoa/Conceptual/Exception
s/Tasks/RaisingExceptions.html

fyi - 
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Exception
s/Tasks/HandlingExceptions.html

"""Important: Although you can throw and catch objects other than NSException 
objects, the Cocoa frameworks themselves might only catch NSException objects 
for some conditions. So if you throw other types of objects, the Cocoa handlers 
for that exception might not run, with undefined results. (Conversely, 
non-NSException objects that you throw could be caught by some Cocoa handlers.) 
For these reasons, it is recommended that you throw NSException objects only, 
while being prepared to catch exception objects of all types."""

I use exceptions that don't inherit from NSException because I wanted a 
light(er) weight exception class. In particular I don't want to provide a name 
and a reason strings, but I do want to include custom information. Also I want 
to differentiate between my exception and system exceptions via different 
@catch statements -- I don't want to catch system exceptions.