Hi, Sorry for a delay with reply.
> Following up on my previous two posts, I believe I've solved my own > problem. > > The GTK theme widgets were set to oxygen-gtk when the crashes occurred. > > Changed the GTK theme widgets to Adwaita and meld works like a dream > once again. > > Please mark as closed (for me). Could you check if it works fine with QtCurve theme or it is still broken? Also you may send a separate bug report for gtk2-engines-oxygen package. Best regards, Boris