Jpegs with an embedded thumbnail and a rotation specified in the exif tag crash pcmanfm when in thumbnail view.
I can do a debug build if that is necessary, otherwise see this:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xad38eb40 (LWP 7968)]
0xb7791a20 in gdk_pixbuf_rotate_simple () from /usr/lib/libgdk_pixbuf-2.0.so.0
#0 0xb7791a20 in gdk_pixbuf_rotate_simple ()
#1 0xb7e4ad73 in ?? () from /usr/lib/libfm-gtk.so.4
#2 0xb771adfd in ?? () from /usr/lib/libfm.so.4
#3 0xb771b107 in ?? () from /usr/lib/libfm.so.4
#4 0xb74b59ca in ?? () from /usr/lib/libglib-2.0.so.0
#5 0xb7435cf0 in start_thread () from /usr/lib/libpthread.so.0
#6 0xb736b41e in clone () from /usr/lib/libc.so.6
Here is a sample photo (put it somewhere, browse to that directory, and then change to thumbnail view): http://db.tt/uCB0XuMQ