Same here, on 13.10 64-bit. It worked great in 13.04, then I did a clean install of Ubuntu 13.10, leaving only /home partition intact, and GIMP has had these menu problems ever since.
Same here, on 13.10 64-bit. It worked great in 13.04, then I did a clean install of Ubuntu 13.10, leaving only /home partition intact, and GIMP has had these menu problems ever since.