So, I tried some of the simples group move moves. 1) load 28 sec of media (1 audio/1 video mp4). 2) switch to d&d mode. 3) double-clic on video track where media piece is. It highlight it and add both A and V to group (observe little lines highlighting them) try to drag group somewhere. It usually works one time but not second. dump reads: BC_Signals::dump_stack cin() [0x88b2082] linux-gate.so.1(__kernel_rt_sigreturn+0) [0xf7ec8570] cin() [0x85e6032] cin(_ZN3EDL18delete_edit_labelsEP9ArrayListIP4EditEi+0x43) [0x85e82d3] cin(_ZN7MWindow10move_groupEP3EDLP5Trackdi+0xa9) [0x86b6eb9] cin(_ZN11TrackCanvas9drag_stopEPi+0x3bf) [0x87c708f] cin(_ZN10MWindowGUI9drag_stopEv+0x4f) [0x86c11df] cin(_ZN11TrackCanvas15drag_stop_eventEv+0x1a) [0x87b6f7a] cin(_ZN13BC_WindowBase18dispatch_drag_stopEv+0x683) [0x88d5793] cin(_ZN13BC_WindowBase23dispatch_button_releaseEv+0xb8) [0x88d5968] cin(_ZN13BC_WindowBase14dispatch_eventEv+0x73e) [0x88e0d0e] cin(_ZN13BC_WindowBase10run_windowEv+0x98) [0x88e15b8] cin(_ZN7MWindow3runEv+0x31) [0x86d7be1] cin(main+0x4cf) [0x83bfdef] /lib/libc.so.6(__libc_start_main+0xf9) [0xf5e4d909] cin(_start+0x21) [0x83c7fa1] full dump attached .... Note I have no labels on timeline at this point ...