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Yes. On Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32, the result for the following lines:
import inspect
class A:
 pass
inspect.getsource(A)
is:
Traceback (most recent call last):
 File "E:/Scripts/Snippets/test_inspect_bug.py", line 4, in <module>
 inspect.getsource(A)
 File "C:\Python32\lib\inspect.py", line 694, in getsource
 lines, lnum = getsourcelines(object)
 File "C:\Python32\lib\inspect.py", line 683, in getsourcelines
 lines, lnum = findsource(object)
 File "C:\Python32\lib\inspect.py", line 522, in findsource
 file = getsourcefile(object)
 File "C:\Python32\lib\inspect.py", line 441, in getsourcefile
 filename = getfile(object)
 File "C:\Python32\lib\inspect.py", line 406, in getfile
 raise TypeError('{!r} is a built-in class'.format(object))
TypeError: <module '__main__' (built-in)> is a built-in class
>>>