Also happens on 13.04 daily build, with dmesg saying:
usb-creator-gtk[411]: segfault at 4 ip 00007fb5e229ed80 sp 00007fff90737378 error 6 in libdbus-1.so.3.7.2[7fb5e227a000+43000]
Also happens on 13.04 daily build, with dmesg saying:
usb-creator- gtk[411] : segfault at 4 ip 00007fb5e229ed80 sp 00007fff90737378 error 6 in libdbus- 1.so.3. 7.2[7fb5e227a00 0+43000]