This is probably related to the problem we detected when selected nested insets inside tables (problem with LFUN_MOUSE_MOTION). I think Martin has an idea how to fix this.
JÃrgen Helge Hafting wrote: > Lyx may crash when selecting nested tables: > > * Selecting two side-by-side tables works well. > > * Selecting a whole table that happens to contain > another table in a cell seems to work. But, using > bold or italic does not apply to all the cells in > the table(s) thus selected. Both tables had some > empty cells, perhaps confusion happened? > > * Selecting parts of a table that happens to contain > other tables inside will often crash lyx when a cell with > an interior table gets selected. > > * Starting selection inside some inner table works, but tends > to crash when the selection expands outside the inner table > and starts to include several of the outer table cells. > > I don't need to try to use the selections, lyx dies while > I expand the selection using the mouse. > > Helge Hafting