I have the same problem. Running personalisation_app gives the following in terminal:

*** glibc detected *** personalisation_app: malloc(): memory corruption (fast): 0x0007ed48 ***
======= Backtrace: =========
/lib/libc.so.6[0x407a91b8]
/lib/libc.so.6[0x407ab50c]
/lib/libc.so.6(__libc_malloc+0xb8)[0x407ac7d4]
/usr/lib/libglib-2.0.so.0(g_malloc+0x44)[0x406a4ccc]
/usr/lib/libglib-2.0.so.0(g_strdup+0x24)[0x406be6c4]
/usr/lib/libglib-2.0.so.0[0x40695174]
/usr/lib/libglib-2.0.so.0[0x40698184]
/usr/lib/libglib-2.0.so.0[0x40698418]
/usr/lib/libglib-2.0.so.0[0x40698718]
/usr/lib/libglib-2.0.so.0(g_key_file_load_from_file+0x64)[0x40698d80]
personalisation_app[0xb29c]
/lib/libc.so.6(__libc_start_main+0x108)[0x40755974]
personalisation_app(gtk_tree_model_iter_n_children +0x34)[0xa6d4]

The whole message here:

http://pastebin.com/ThaL28HW

Did some more searching and unistalling package duitheme did it. I thought I had removed that demo widget, but it had some lurky packages.