I'm also having the same problem on Ubuntu 16.04 when testing ITK-SNAP NIGHTLY BUILD
I get a Segmentation Fault when I select the DICOM files to open and click Next. Tested on the same dropbox data.
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Thread 1 "ITK-SNAP" received signal SIGSEGV, Segmentation fault.
0x00000000015e7585 in GuidedNativeImageIO::ReadNativeImageHeader(char const*, Registry&) ()
(gdb)
(gdb)
(gdb) bt
#0 0x00000000015e7585 in GuidedNativeImageIO::ReadNativeImageHeader(char const*, Registry&) ()
#1 0x00000000012a210e in ImageIOWizardModel::LoadImage(std::string) ()
#2 0x00000000012a3bc4 in ImageIOWizardModel::LoadDicomSeries(std::string const&, std::string const&) ()
#3 0x00000000010f99e0 in imageiowiz::DICOMPage::validatePage() ()
#4 0x00007ffff680c4cf in QWizard::next() () from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#5 0x00007ffff4cae4df in QMetaObject::activate(QObject*, int, int, void**) ()
from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Core.so.5
#6 0x00007ffff66d27b2 in QAbstractButton::clicked(bool) ()
from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#7 0x00007ffff66d29a5 in ?? () from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#8 0x00007ffff66d3a64 in ?? () from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#9 0x00007ffff66d3c04 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) ()
from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#10 0x00007ffff661b278 in QWidget::event(QEvent*) ()
from /home/brenno/Downloads/itksnap-3.6.0-20170401-Linux-x86_64/lib/snap-3.6.0/libQt5Widgets.so.5
#11 0x00007ffff65d7f3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
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