Is this a local build? Is this the standard configuration beyond just turning on SimpleITK?
What is the contents of the python's "site-packages"?
From a Slicer super build it would be "./python-install/lib/python2.7/site-packages/". The directory listings for the SimpleITK egg directory and the contents of the "setuptools.pth" file are also of interest.

I just re-started a clean local build with the following options. Will keep you posted.

cmake -DCMAKE_BUILD_TYPE:STRING=Release -DQT_QMAKE_EXECUTABLE:FILEPATH=/home/jchris/Support/qt-everywhere-opensource-release-build-4.8.5/bin/qmake -DSlicer_USE_SimpleITK:BOOL=1 -DSlicer_USE_QtTesting:BOOL=0 -DSlicer_USE_PYTHONQT_WITH_OPENSSL:BOOL=1 -DSlicer_BUILD_CLI:BOOL=0 -DSlicer_BUILD_QTSCRIPTEDMODULES:BOOL=0 -DSlicer_BUILD_DIFFUSION_SUPPORT:BOOL=0 -DSlicer_BUILD_MULTIVOLUME_SUPPORT:BOOL=0 ../Slicer-1

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Is this a local build?
Yes

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Contents of site-packages folder:

$ pwd
/home/jchris/Projects/Slicer-SuperBuild-Release-Qt485/python-install/lib/python2.7/site-packages

$ ls -1 SimpleITK-0.7.1.post1-py2.7-linux-x86_64.egg/*
SimpleITK-0.7.1.post1-py2.7-linux-x86_64.egg/SimpleITK.py
SimpleITK-0.7.1.post1-py2.7-linux-x86_64.egg/SimpleITK.pyc
SimpleITK-0.7.1.post1-py2.7-linux-x86_64.egg/_SimpleITK.so

SimpleITK-0.7.1.post1-py2.7-linux-x86_64.egg/EGG-INFO:
dependency_links.txt
not-zip-safe
PKG-INFO
SOURCES.txt
top_level.txt

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Content of "setuptools.pth"

$ cat setuptools.pth
./distribute-0.6.28-py2.7.egg

I completed a clean build on a RH6 system and it works OK.

Everything looks in order with what you posed. I have seen crashing when importing SimpleITK when there were multiple eggs installed, and version mis-matches of ITK and other dependencies.

A stack trace would also be useful.

Do most of the Slicer tests pass? There are no other issues with the build?

A library dependency issue also comes to mind. Either a mis-match of the libraries _SimpleITK.so depends on compared to other ITK/Qt. Or some mis-match source files during the build causing problems.

Thanks for checking on your side.

I confirm that a clean Release configure/build [1] on the system documented in the issue description leads to a crash after importing SimpleITK [2]

On the other hand, a Debug configure/build works as expected.

As a side note, on a release build, I also have issue loading dicom files. Currently investigating.

[1] cmake -DCMAKE_BUILD_TYPE:STRING=Release -DQT_QMAKE_EXECUTABLE:FILEPATH=/home/jchris/Support/qt-everywhere-opensource-release-build-4.8.5/bin/qmake -DSlicer_USE_SimpleITK:BOOL=1 -DSlicer_USE_QtTesting:BOOL=0 -DSlicer_USE_PYTHONQT_WITH_OPENSSL:BOOL=1 -DSlicer_BUILD_CLI:BOOL=0 -DSlicer_BUILD_QTSCRIPTEDMODULES:BOOL=0 -DSlicer_BUILD_DIFFUSION_SUPPORT:BOOL=0 -DSlicer_BUILD_MULTIVOLUME_SUPPORT:BOOL=0 ../Slicer-1

[2] ./Slicer --disable-builtin-modules --python-code "import SimpleITK"

Replicating you configuration line I got the following configuration error (during Slicer?):
CMake Error at CMake/ExternalData.cmake:161 (add_test):
Error evaluating generator expression:

$<TARGET_FILE:EMSegmentCommandLine>

No target "EMSegmentCommandLine"
Call Stack (most recent call first):
CMake/SlicerMacroSimpleTest.cmake:44 (ExternalData_add_test)
Applications/SlicerApp/Testing/Cpp/CMakeLists.txt:56 (simple_test)

Had to add the following to the configuration:
cmake -DSlicer_BUILD_EMSegment:BOOL=OFF

Unable to reproduce the crash.