yeah, this happened when I was looking through starter content materials, I thought something from the log would be useful. This time I was using the first person template. C++ of course.
[2014.10.16-02.37.42:980][309]LogContentBrowser:Verbose:
The content browser source was changed
by the sources view to
‘/Game/Materials’ The thread 0x14cc
has exited with code 0 (0x0). The
thread 0x1fe0 has exited with code 0
(0x0). HEAP[UE4Editor.exe]: HEAP: Free
Heap block 000000739174E830 modified
at 000000739174E8E8 after it was freed
UE4Editor.exe has triggered a
breakpoint.