the problem remains for me, just updated my CC branch build (for the CC related fixes). The right click menu only appears when right clicking on the tab header, but no within the tab itself (with or without some selected text).
EDIT : I just even experienced a crash while right clicking inside the tab :
<stack>
<frame level="0"/>
<frame level="1" function="wxListMainWindow::ScrollList(int, int)" offset="00000016"/>
<frame level="2" function="MouseEventsHandler::OnMouseEvent(wxMouseEvent&)" offset="00000566"/>
<frame level="3" function="wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)" offset="00000055"/>
<frame level="4" function="wxEvtHandler::SearchDynamicEventTable(wxEvent&)" offset="0000004f"/>
<frame level="5" function="wxEvtHandler::ProcessEvent(wxEvent&)" offset="00000092"/>
<frame level="6" function="wxTextCtrl::GTKProcessEvent(wxEvent&) const" offset="00000019"/>
<frame level="7"/>
<frame level="8"/>
<frame level="9" function="g_closure_invoke" offset="0000015e"/>
<frame level="10"/>
<frame level="11" function="g_signal_emit_valist" offset="00000625"/>
<frame level="12" function="g_signal_emit" offset="00000083"/>
<frame level="13"/>
<frame level="14" function="gtk_propagate_event" offset="000000c3"/>
<frame level="15" function="gtk_main_do_event" offset="000002cb"/>
<frame level="16"/>
<frame level="17" function="g_main_context_dispatch" offset="000001f3"/>
<frame level="18"/>
<frame level="19" function="g_main_loop_run" offset="00000195"/>
<frame level="20" function="gtk_main" offset="000000a7"/>
<frame level="21" function="wxEventLoop::Run()" offset="00000048"/>
<frame level="22" function="wxAppBase::MainLoop()" offset="0000004b"/>
</stack>