Works on Linux. Stack trace?

No crashes here.

On my Windows machine it gracefully says in a message box that it has no reader available for JPG/JPEG. PNGs are working.

Okay, it seems the reproduction is not quite as easy to do:

1. Start MITK Workbench
2. Open "Viewer" Perspective (No View open, just the multiwidget)
3. Close the application
4. Start MITK Workbench
5. Drag and drop jpeg etc.

-> Crash

Access violation in mitkImage.cpp line 148

double returnvalue = (((T*) data)[rgboffset ]);

Besides the crash, this reveals (reminds me of) another issue. Should we match known files extensions in a case insensitive way to file names?

I would imagine that loading "jpeg" files works, but "JPEG" doesn't currently (even on Windows).

Is there a reason not to? Off the top of my head I do not know any format where different capitalization is a different format.

Definitely case insensitive.

Agree, insensitive. Many programs don't even use case consistently in file endings.

Crash fixed in T18110.

Case insensitive extension matching implemented in T14866.

All merged to master.